A good friend and I are in the process of agreeing to something vaguely similar. We each get x% of the others' proceeds if we're a founder at a company that has

A good friend and I are in the process of agreeing to something vaguely similar. We each get x% of the others' proceeds if we're a founder at a company that has an exit. So it increases our chances of seeing a payout and decreases that payout by x% (but x is small.) Ideally we'd have a couple more good friends-who-are-equally-likely-to-be-founders join in, and we'd really have a good pool...