This is the consequences of the action done by those people trying to take advantage on the system.

Since for what they do like buying account or other abusive action they made on stake it made the management to decide whether to decrease the bonuses to give by each level to their player or they might totally eliminate it.

There's certain topic about this which he complain about the adjustment of bonus given https://stakecommunity.com/topic/124280-concerns-over-unfair-bonus-adjustments-delete-it-again-just-try/