For me it depends on the reason I am in the band and what the band is being asked to do "whats in it for me".
I used to play in covers/tribute bands, I would expect to get paid for these gigs I am there to play and hopefully make money.
At the same time I have played in a jazz trio, again this was covers, we'd rock up play standards in a pub every fortnight. Our pay was £40 for a taxi and 6 pints (2 each). Never expected a penny and usually the fee covered our taxis home. I was doing this to experience playing jazz standards live.
Also played in originals (still do) bands, never expect payment its about playing music i want to play, and people coming is a bonus, unless someone is selling tickets with our name on it and they have sold allot (its not happened often) where I'd expect the band to be paid. In all of these bands any money earned is put back into the band and no one ever takes a cut for themselves.
So to the OP I play live to get something from the gig, given how i balance my music it generally wont be money. But before I join a band I will know 'whats in it for me' and thats why I'lll play with that band.
Jonny