There are no written rules, but if I see a moderator did the same thing for the same case over and over, I will call it an unwritten rule.
If you don't believe, try to create two threads in gambling board, one is accepting BTC and another one isn't. Report your own thread, then let's see what the moderator would act.
Yes, that’s exactly why I don’t want to give specific examples here. I’m also sure that the moderators will move such topics, and I also don’t see any specific rule that would prohibit posting them in the Gambling board. It would turn out that I’d just become the trigger that disrupts the marketing plans of the authors of those topics.
And if there were a dedicated section for gambling platforms that don’t accept bitcoins, everything would be clearer and more straightforward.