I would not like to say that they do not know that Reddit is only popular in certain regions because gambling platforms usually have a very strong team that engages in serious market research before they enter any sort of project for marketing or promotion. They know the statistics and most likely are okay with it.
Maybe the marketing teams of various gambling platforms have some reason to promote the brand through Reddit, but in my subjective opinion, it's an ineffective source of traffic to attract gamblers.
I just repeatedly noticed that the Reddit accounts of casinos, as a rule, have very low user activity. This applies not only to Betfury but also to other crypto gambling platforms.
Imho, the activity of gamblers on this forum and in other social networks is noticeably higher than on Reddit.