Well, of course you have to deal with this stuff. Bad affiliates spoil it for the rest of us and I’ll be first in line to want to see them removed.
But, you can’t deal with it by imposing a retroactive blanket quota.
Once such a thing is in T&Cs, it stays. You may not always be there, your successor may have other ideas about how to implement it.
So we just can’t go along with such a clause.
Try to find a better way to cover this in your T&Cs and blow them out of the water, I say!