Mixer sites are banned from this forum.  And altcoin projects don't have huge marketing budgets.  You will find that signature campaigns on this forum require a large budget to keep active.  And this budget gambling sites can only manage.  And now that crypto casinos are very popular, this forum has become a big place for gambling companies' marketing.  And since the signature campaign has some rules to post a certain minimum amount on the gambling board, the number of gambling board posts is very high.