On Time Critiques
Users are given a Critiquing Coin at sign-up. Readers must have a Critquing Coin in order to get matched to a document to critique.
Readers are given one day to critique for every 25 pages. The only way they lose the coin is by not submitting a critique on time.
If the coin is lost, another can be bought for $10. That price doubles each time the coin is lost. The writer whose work didn't get critiqued gets to chose which charity receives the collected funds.