Do you change it up with betting amounts?
You should change your bet size the least amount and least often that you can.
Changing your bet size will change your breakeven point, and usually not for the better.
There are some exception, like partial Kelly betting, but that's a different level and different faith in your confidence and edge estimation, something we don't see much of around BMR.
So most should heed the advice and only change their bet size when they've stepped up or stepped down to a predetermined level of bankroll.