Just as I said I mentioned I read a few comments somewhere a long time now, how this casino have the final say on the amount they give out in bonuses, don't know but it could be found in the casino terms and conditions for bonuses and rewards distributions, this may not be same on all casino, but majority of them will likely control the rewards each gambler receive in form of bonuses or cashbacks offers, if and when I find a link to support this I will share it, otherwise just treat this statement as just assumptions that need more clarifications.
Most of the casinos reveal the exact parameters of calculating the bonuses. But Stake has never done this. The regular VIP loyalty system benefits are same for all the users at each casino. The marketing team only controls the exclusive bonuses based on the gambling activity of the users. I strongly believe that your statement is based on assumptions. The only transparent bonus of Stake is the rakeback. It used to be 10% of the house edge in the past. Which has been reduced to 5% 2 years ago.