I did not know that. But dont you find it strange that BetFury isnt collaborating with any celebrity? Stake, Duelbits, Sportsbet. Even exchange crypto.com has signed with UFC for example. Isnt it an indicator that such promotion works. But instead BetFury has daily competitions for ages. I am not to blame their tactics, but would be great if we have something new.
Different casinos have different tactics for marketing purposes. BetFury hasn't decided to spend money on the sponsorship deal like other casino yet. But BetFury is the oldest casino with their own tokens. It looks like users betting activity is quite low at BetFury sportsbook compared to the other sites you have mentioned above. That's why they aren't interested to spend money on such sponsorship deal.