10 Affiliate Niches You’d Swear Don’t Exist (But Totally Do)

So here we are, Sunday morning. The kettle’s whistling, the world feels a little slower, and instead of tackling spreadsheets or keyword research right now, I thought I'd do something different.
Research.

I’m here to tell you I’ve found 10 weird affiliate niches you probably never guessed were real. But we’re not just making a list! Heck no! We’re going to look at:

• What these niches actually are and their top-selling products,
• Why they work for us as affiliate marketers,
• How AI can make marketing them easier, and
• How Wealthy Affiliate gives us the tools to turn these oddball niches into profit.

So, pull up a chair, if you're not already sitting down... this is going to be fun.

1. Costco Memberships

I’ll never forget the first time I learned Costco even had an affiliate program. Which was this morning. My brain went, “What, do I get paid every time someone buys a pallet of ketchup?” Nope. Turns out the top seller is their Executive Membership — people gladly fork over more for perks like 2% cashback. Affiliates earn a small cut, around $3 for Gold Star and $6 for Executive. But.... it’s Costco. That name alone converts. Right?

Why this works for us: Big brands = big trust. People don’t hesitate when they see Costco.

AI assist: Spin up a comparison blog like “Is Costco Executive Really Worth the Extra $60?” and let ChatGPT draft savings scenarios.

WA advantage: WA teaches you how to rank these kinds of posts, so when someone Googles “Costco membership worth it,” they land on your page.

2. Embark Dog DNA Kits

Ok, so imagine telling a friend, “Yeah, my dog’s 23% Siberian Husky, 10% Chow Chow, and 2% wolf.” That’s what Embark sells. Their Breed + Health Kit, priced around $199, is their best-seller. People LOVE uncovering hidden truths about their pets.

Why this works for us: Curiosity is a marketer’s best friend. Folks can’t resist knowing “the unknown.”

AI assist: Build a fun quiz: “What secret breeds might your dog have?” The quiz results funnel readers straight into your affiliate link.

WA advantage: WA’s training shows you how to capture traffic for phrases like “best dog DNA test” and funnel that curiosity into commissions.

3. Rescue Dog Wines

I stumbled on this one accidentally, while sipping a glass of pinot blanc, and I almost spit it out. A wine brand that donates profits to animal rescue? Their Rescue Rosé is the top seller, often bought by pet parents who want to drink with purpose. Who knew!

Why this works for us: It’s indulgence + cause marketing rolled into one. People feel good spending money here.

AI assist: AI can write heartfelt social captions like “Every sip saves a paw.”

WA advantage: Storytelling is the backbone of affiliate marketing. WA teaches you to write posts that tie heartstrings to products.

4. Nature’s Head Composting Toilets

Alright, let’s get a little less glamorous. Nature’s Head makes composting toilets, and trust me, they sell like crazy in the sustainable living market. Their self-contained model sells for around $1,000, and affiliates can earn 5–10%.

Why this works for us: Sustainability is no longer a trend, it’s a lifestyle. People pay for green solutions.

AI assist: Draft “green living swap” guides like “5 Things I Ditched to Live Cleaner.”

WA advantage: WA’s keyword research tool helps you find those long-tail gems like “best composting toilet for small homes.”

5. ButcherBox

This one blew my mind when I checked the numbers. ButcherBox, a meat subscription service, has affiliate payouts as high as $20 per lead and boxes averaging $169/month. Their best-seller? Mixed boxes with beef, chicken, and pork. I'm affiliated with TruLocal, which is a similar program, but the numbers are different. I might need to switch.

Why this works for us: Everyone eats. Add in convenience, and it’s irresistible.

AI assist: Generate recipes that feature ButcherBox meats (“Weeknight steak dinners under 30 minutes”).

WA advantage: Training on building recipe posts that double as affiliate content makes this a goldmine.

6. KiwiCo Subscription Crates

Ever seen a kid’s face light up when a science experiment goes right? KiwiCo’s subscription boxes, especially the Tinker Crate, are their top sellers. Priced around $23/month, they combine fun with learning. Sort of like GreenKid Crafts...

Why this works for us: Parents crave meaningful screen-free activities for kids.

AI assist: Write blog titles like “Rainy Day Activities That Don’t Involve Screens.”

WA advantage: WA shows how to capture seasonal traffic spikes (think summer vacations or back-to-school searches).

7. Brooklinen Sheets

A mattress brand? Nah — it’s the sheets that sell. Brooklinen’s Luxe Core Sheet Set, retailing at $179, is their bread and butter. Affiliates earn around 10–15%. And also, who doesn't love Brooklinen and it's play on words of Brooklyn. That's smart advertising.

Why this works for us: People don’t just buy comfort, they buy status comfort. “Hotel-quality” at home is a vibe.

AI assist: Create review articles comparing Brooklinen to competitors. AI can draft side-by-side features.

WA advantage: Training on review-style content helps you nail these “best sheets” searches.

8. Fender Guitars

Yep, Fender has an affiliate program. Their Player Stratocaster is the hot seller, often running around $849. For every wannabe rockstar out there, Fender is the dream.

Why this works for us: Passion niches (music, hobbies, crafts) are bottomless. People don’t buy guitars logically; they buy them emotionally.

AI assist: Generate “first guitar guide” blog posts in minutes.

WA advantage: WA helps you niche down (“best guitars for beginners”) and dominate with evergreen content.

9. Purple Mattresses

So this one's kind of interesting. Purple’s Hybrid Premier is their top seller, often priced at $2,000–$3,000. Affiliates earn up to 7% per sale — do the math, that’s a healthy commission. Forget every mattress store out there, and go Purple!

Why this works for us: People shop for mattresses online more than ever.

AI assist: Craft buying guides with AI (“Top 5 Mattresses for Side Sleepers”).

WA advantage: WA teaches structured content that turns big-ticket reviews into conversions.

10. Viking Cruises

And finally, let’s set sail. Viking Cruises offer affiliates payouts for referrals, with luxury river cruises being their top-sellers. Average bookings can exceed $5,000 per trip, with commissions often at 3–5%.

Why this works for us: Travel is about aspiration. People love to dream, and cruises are a tangible dream purchase.

AI assist: Generate itineraries like “What to Expect on a 7-Day Danube Cruise.”

WA advantage: WA teaches you how to turn wanderlust into rankings, and rankings into commissions.

Final Thought

So there you have it: 10 niches, all real, all surprising, all profitable if you know how to market them. From Costco memberships to composting toilets, from wine-for-a-cause to Viking cruises... it’s proof that there’s no such thing as “too weird” or “too niche.”

What do yo think? Are there more crazy niches you can find? I know they exist, maybe you have the next gold mine!