I see so many casino tried to became more active on X since they know that this is big platform and to many gamblers are there seeking for good casino to try. If they don't know how to do it maybe they should seek for professionals that can help them to manage their social media pages then try to lure people to gamble on their casino.
They can hire a social media manager to handle their X account but I really think that they have available internal human resource for this marketing task. When they see need to have more activities on X because it can bring better effects to their business, they will take appropriate action.
Some gambling companies are more actively on X than others and I know some big casinos don't mind to be active on X too. It's hard to say why they choose this approaches and I don't say Gamegram team are doing wrong things. We are only outsiders of their business while they are insiders and have data to assess their business operation, efficiency including marketing budget and effects received from marketing programs on different platforms.
Like you can not say casinos are actively on X that they have bad marketing choice because they did not appear in bitcoin forum.
We can call it as "target priority", some casinos prefer to be more active in 1 or 2 social medias than other places for a reason that we may not understand.
Of course there is nothing wrong with the preferences but logically the more places = the more attention they may get from social media users.
Social medias can be said as a free advertising place that can be used by any casino to promote their product, so the marketing manager of the casino should be able to use it wisely and effectively.
What you said in the first lines of your comment Is correct, but where I think you got it wrong is where and when you said "for a reason we do not understand", of course common sense should tell us all that the number one reason why a casino will choose to be more active on a particular social platform or two of it, is because those social platform(s) they are active on is possibly where they think their target audience is or are.
Like for example, if the management of a casino believes that they will gain alot of audience, as well as users from bitcointalk forum; far more than they will do on any other social platform, the management will definitely spend far more time on bitcointalk than they will do on other socials, specially when the management of the casino isn't big enough to have multiple marketing personnels manageing their different social accounts., so whoever is given this responsibility have to pay more attention and be more active to the platform where they are getting the most customers from.
The main purpose of promoting a project is to reach the targeted audience and when it comes to cryptocurrency casino, we have what we call social media plartform regulations, this is a situation that not all content can be posted on such plartform, e.g Facebook that ban all cryptocurrency related add, this is bad market for cryptocurrency casino going on such plartform to promote their brands but on the other hand, Facebook is a big market place for fiat gambling projects, so from this, the priority have changed and as a project team their is a need to shift focus from such a plartform to others, I don't know of X how their Ada policy is, but gambling most especially cryptocurrency gambling promotions is highly sensored on those plartforms and at that should be avoided if you want to have a long term promotion and building a strong community for your projects, one of the reason why bitcointalk become the best choice for cryptocurrency casino is because of those challenges faced in promoting projects that are crypto related on those other plartforms.
So for cryptocurrency casino promotion, the best place to come is here, regardless of what your targeted audience may be, here you have active gambler's and at the same time having a friendly environment to build trust and stay Active with your player's solving issues and enjoying feedbacks via their comments on the ANN, there are loads of ways to promote your casino in here, and all of them have no single restriction or control over by the forum admin.