I'm fine with building out stupid ideas, for one of two reasons.
One, we've been friends for a minimum of 5 years and I sincerely like you as a person.
Two, you pay me.
At least twice I've had situations where I basically need someone at a bar or something and within a week they're sending me a bunch of specs to program out something that will require a small team to do properly. Then when you do hack out a small prototype it's not good enough.
At this point in my life, I'd rather work on my own solo projects if anything. I'll release the code MIT and if someone smarter than me wants to make money off it they can