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[mikejet]

You could always mimic Ebert's idea with his online club. One lifetime membership fee(it was cheap like $4.99) that got you life time membership to his club. With that you got a special newsletter and access to things before all the other people who follow his site do.

Considering the size of the user base and the small minimal fee you could theoretically raise enough capital in a small window to do the upgrades wanted. Then, you can end the window to sign up for a cheap amount.