If I mention another site, it gets replaced with [link removed -- VP].
The site doesn't allow advertising of other sites. Topics where there are comparisons with named sites, that is essentially give advertising to those sites and chess.com doesn't want to provide a platform for that.
It is just as easy to mention things one may like on another site or that chess.com might want to add, but it can easily be done without naming any specific sites.

If I mention another site, it gets replaced with [link removed -- VP].
I am not even talking about competition, even if I mention a website it censors it