I saw those "Guaranteed Play Blackjack" chips on ebay. I'd never heard the term before so I looked it up on line. Here I a description of how it works. Surprisingly it was shown at the 2007 Gaming Expo so it's had a while to mature.

http://www.bjinsider.com/newsletter_95_g2e.shtml

It still isn't clear to me why they would have a $2.50 "Play token". Any thoughts from other players?