get what you pay for

Most poetry events are free, so organizers can’t give a money-back guaranty.

random acts of poetry

When he got back to his parked car, he thought he’d been given a ticket, but someone had stuck a poem under one of the wiperblades.

post-facto ticket

Poetry readings are often free admission. When you buy the poet’s book on the way out, it’s sort of like purchasing a post facto ticket.