I believe most people just discuss gambling to fulfill their signature requirement, sadly! I believe most of them don't even gamble, and some of them gamble with some small amounts, like with rains/faucets/giveaways... they would probably withdraw that too, but it's under minimum!
I'm a gambler for almost 2 decades, in and outside the cyber world. But for me, it's not a requirement to be a gambler in real life just to fulfill the user's signature requirement. What if they really have knowledge about the topic. If they follow the rules of the campaign properly, I don't see any problem with that.
The topic was subjective. If the users are doing great on their posting, we shouldn't bother to think if they are gamblers or not. Why should we care about their respective activity if, on the other hand, their response is healthy? They are free to share their knowledge about a certain game or sports, of course as long it was constructive.
We can determine if a certain posts are
sh*t or not. Even back before, spam is the problem here in the community so even reporting the post isn't effective as others think, it somehow minimizes the problem. If we have complaints about the user, I'm sure their respective campaign manager is open to any concerns. Just give them a DM.