Personally, I don't get why Twitter is still popular and that a lot of casino really use it. It is full with bots and I really doubt if it is really so effective for marketing.
There are bots but at the same time real community as well so most of the promotions are done there.Moreover you will find the gambling community is active there while most of the other social platforms are not good and suitable for such promotions.They are getting attention from Twitter so it's going good for them.
The numbers could be bots mainly that is true but the activity is still there, there are tons of people who still use twitter daily, and I mean way too many people. Plus it has very big importance as it can lead to even elections to shift, it's that much important. I believe that there was a situation where governments started to meddle with twitter so much that they ended up getting twitter into trouble at some points and Elon tookover to showcase that.
I dislike him but that was a good thing to do. At the end of the day there is nothing wrong with liking one social media more than the other, but when twitter allows you to raise your voice and get heard, that is a lot more important than other stuff you could end up seeing in different social media companies.