http://msmvps.com/williamryan/posts/6569.aspx

“It all reminds me of the Port O Potties at my first Lallapalooza concert.  If you could have sold $20.00 tickets to a clean restroom you'd be rich.  And if there were only $20.00 restrooms available, there still wouldn't be too many takers on the Free Port O Potties.  I think the analogy holds here as well.”