Anyway, I'm just trying to inform folks that this is a possibility, and that they should take care of this sort of stuff early. It doesn't take long, and it isn't expensive.
One of the reasons I signed and took your $25 offer was because I wanted to live in a future where I didn't feel massively entitled to someone else's successes. At some point it makes sense to lock in your friendship with your friend-who-you-decided-to-maybe-cofound-with-but-stayed-in-Boston-instead and move on with your life, before money gets in the way.
That said, every story is different. Just because all I made for borski was a silly logo, doesn't mean that this Cruise fellow didn't make a more significant contribution. For better or worse, it looks like that story will play out rather publicly now.
It will be very interesting to watch this play out.