The site has rules and one of them is not to allow advertisements or direct, named discussion of competitor sites.
For your second point, the site doesn't close accounts on the basis of a single game unless it was blatant unfair play. However, that isn't a discussion allowed in the general forums.
That can be done here: https://www.chess.com/club/cheating-forum
Please Don't Pass This By!
Chess.com is a great site. I love the community and the experience of playing in it. But I have a few problems that I need to be addressed. Please do me the favor of making this forum big enough for the moderators to notice. No spam though.
Problem#1: Chess.com censors the names of all other chess sites. This is not right. Chess is a universal game, and we deserve to be able to talk about our time elsewhere.
Problem#2: Chess.com is deleting the accounts of many people who did not cheat. One of my friends had his account removed after beating an IM fairly. Please fix your system, chess.com!
If anybody has any other complaints, comment them! If I see a certain complaint stated enough, I'll add it.