You mean like people would have to spend real money in order to be able to participate in this event?
That would be outright filthy imho.
That's what made it a "crazy thought" rather than a "Hey i have an idea!"
The argument could be made that you're given ARX for playing the game, so no real money would be required. Flimsy IMO, but an argument.
But morally (ethically? /shrug) questionable business practices aside - did anyone try it?!