Then sorry to say, but such players who do not care about the growth of the casino but only care about the bonuses they hope to get from the casino are nothing but so selfish..
No free lunch and if a casino runs advertisements, they must want to gain something else. If they run promotion with bonuses, they do want to get something else from their current users or from new users who will open accounts on their casinos after reading active promotions with great bonuses.
If users can simply exploit bonuses from a casino, that casino will stop operations soon. It is not what Stake have run and gotten so far as they are very big casino and if they run their marketing many years, their business does operating well and their marketing programs brought good effects.
In as much as bonuses are still important to keep players playing, promotions, partnerships are still very important to increase the casinos popularity, reputation which will put the casino in a good position to win even more players over to the casino, the more there are several players playing and losing, the more there are much more bonuses available to distribute to qualified players.
Users will like bonuses and they will become loyal customers if a casino run multiple promotions in a long time. As players, they must gamble responsible to be able to bet in a long run. If they gamble too greedy, they will lose all money, get rekted after a few bets.
Believe it or not, players do not really care about such partnership deal as it gives no good effect for players. Some players may even think that new partnership deals, new ambassador, etc will affect the bonus given to them. What players want are more bonuses/promotions that make players stay as long as possible and better experience in the casino, so Stake should also think about it because having partnership with popular brands/people will not make players stay.
Partnership announcements are always cool but users will wait for later announcements to celebrate new partnership like promotions. Maybe some users don't care about such but most of users do care as who don't like giveaways, gifts from the air?