You are changing the peg from $1 to $0.75 essentially

I don't agree with this because there are other places that the peg applies, such as choosing between 50/50 and 100% HP payouts. If HBD gets too much below $1 posters will switch to 100% HP en masse and the supply of HBD will dry up.

A 25% fee would make the downside peg weaker but it isn't quite the same as moving it to 75.