What would you do in my shoes?

Don't get me wrong. I regularly check my own texts, not those written by others. But, when you read a fellow member’s post and you just have a feeling that it sounds like a pure sales pitch...And, when you check, you get the above result.

Plus, the whole thing is about something that you think is not worth at all, full with exaggerated promises, while it is highly recommended by the author. For the sake of supporting your fellow member’s site, you try to come up with a comment, but then realize you can’t possibly do it and not lie. You give up.

In a couple of days, you run into another article on the same site and you already know that what it is recommending is a scam. You try to compose a contributing comment, but, it is a scam-so how can you support the author praising it?

And then-you suddenly need to return the favor to the same site for another article you can’t possibly agree with. If you don’t comment, you are rude. If you do and tell what you think-rude again. What to do?

Is it correct to only go away and not get involved at all, avoid it as much as possible in future? Would it be more correct to let the author know that all you can see there is a copied sales pitch one after another? I'm clueless. What would you do in my place?