First when casino advertise in this forum, it does not get exposed to only forum members alone, but also other visitors to the forum will also get to notice them also and and getting wider visibility enhances the casino traffic generation and potential revenue increase.
so it makes sense that casinos decide to advertise here as they hope to reach not only those that are part of the forum but all of those that may visit it once in a while.
I have different theories regarding the reason why casinos like to advertise on this forum.
Perhaps they think that anyone willing to invest into cryptocurrencies would be a person who is risky in nature and therefore would make a good gambling cash-cow? I think that might be correct, but only from a certain part of the community. A lot of us understand crypto is not gambling but rather it can be used for gambling. Those are two different things and they should be respected individually as such.
Or perhaps gambling was just one of the very first adopters of cryptocurrency and blockchain, and we as a community have therefore accepted it into our culture for this very reason?
It is really a bit hard to tell without extensive research.
I also believe so, the gambling market has become one of the highest markets for cryptocurrency and ever since the creation of the first coin in 2009 the phase of payment to the online casino has changed and they have widely adopted cryptocurrency since bitcointalk has been the first and only original bitcoin discussion forum, all services that use Bitcoin will like to have a long term promotion here in the forum.