The following countries are unable to join Starter, but they can join as Premium right away. So they are not in essence blocked, just from the starter membership.

Bangladesh
Egypt
Ghana
Pakistan
Kenya
Morocco
Tanzania
Viet Nam

The following countries are unable to join Premium, even as a paid Premium member. This is due to high fraud rates and our decision to do this has been based on millions of data points.

Senegal
Turkey
Nigeria

I hope this clarifies for you here.

Good to know this, thanks Tony for asking and Kyle for answering.
Best wishes
Gaz

Thanks for asking the question. I did not know this, but Kyle has made it clear.

Hello Tony, thanks for posting this question. I was wondering why 3 of my friends in Nigeria whom I invited to join WA told me they could not, and I was kind of not believing them. I was thinking they are just making alibis.

Now, I understand why. They visited my website though. Thanks for the answers and comments on this question. I hope everybody see this post.

Cheers and God bless,
Chuna

Hi Tony - as far as I am aware, the most up to date information is Bangladesh, Egypt, Ghana, Pakistan, Kenya, Morocco, Tanzania, and Vietnam.

And Senegal, Nigeria and Turkey are completely banned.