but I assume they did it to cut down on operational cost and expenses, in other to increase profit .
Cost cutting is usually the reason for these slashes of their commission percentages and that can't be foreseen. But with such experience from the others, you are having the idea that it can happen elsewhere when you're expecting it. Another reason might be that some plan offers they're about to open.
Yeah, Cost cutting is the typical move of some casino to lessen expenses from affiliates especially for those affiliate that doesn’t invite new referrals and only relying to the existing invites that they already profited for a long time. Retroactive affiliate commission is not new affiliate system of casino since the affiliate can’t pull out their invites anymore once they already registered and made tons of bets in the casino due to VIP level.
main problem would be breaking their word, changing something they promissed
otherwise it may make sense for a casino to leave the affiliate program active for a determined amount of time only, like, let's say, 1-3 years.
duelbits did something like that? I didn't keep up.