As far as I know, they just cut the next block fees, So that your transaction is mined on the next block, maybe it will take less than 10 minutes to be confirmed.
I'm aware that they do not take any cuts from the fee and spend everything based on the price, but if the average fee price will spike to a lot higher, will stake allow us to exchange our btc to some other altcoins available there to save on fees? It becomes too costly when I just have $20 to withdraw and the fee is worth more than $7.5, I will get almost nothing on my hands.