I have no idea what is happening in Stake but I'm sure we are not the only players who get disappointed with their recent bonus, there must be many other players who feel the same.
I know what's happening on Stake actually. In the past, they were giving the best bonuses to the users. Gradually, Stake team started to spend money on marketing by doing sponsorship deal with players, teams or clubs, streamers, etc. Now they are spending a very big amount for the marketing purposes through those methods. And they have reduced the bonuses of the users to spend those funds in marketing purposes.
Can you confirm what game you are playing? for example $3k wager on Dice and $1k wager on Slots.
All of my wage