sites like rollbit,stake etc will never tell you the exact calculation they use to calculate bonuses ;; so that they can reduce these whenever they feel like it.

Many companies use somewhat false advertising saying you get a discount of UPTO x% while hiding in the TnC or just giving some thing useless for that % discount

Same thing here where they say UPTO 50% but dont mention the requirements for it, its probably only for the super duper vips who bet millions and dont care about it anyways

Its super shitty but everyone essentially does it sadly