Please, please, please, please, please!! I would pay also.
I love the though of an unlimited FO (aka, reciprocal ignore). Much easier to eliminate a few power tools than manage a list of 80. That way you could keep your FO as your "inner circle" and much smaller, essentially following every post of a few favorites (edit - not saying I want to get rid of FO).
I would pay for a reciprocal ignore feature.