I think the problem is that player websites are not part of AGS’s control. This is fine for a sub reddit for example, but Amazon would have to vet each site, every update, to make sure links that are advertised, are exactly what they say they are, for legal purposes.
Or I could be wrong and they just don’t posts from players.
Normally, when you leave an official site, there’s a warning to say that you’re leaving and you do so at your own risk. I see not why that can’t be done on here.