The DCC has maxed out on the number of players per event, so they can't acquire more money that way. According to the online pro commentary, many of the pros will not attend because the purses are too small to warrant the expenses. If the pros stop coming, so will many of the participants.
The only solution I can see is to raise the entry fee-- certainly the main fee, and see how that affects the buy-backs. Guys are already spending a grand or more, so why not kick up the fee to $250 or $300?
The amateurs make the event! Raising the rates on the amateurs will be the end of the Derby. The Pros complaining are the ones that don't have any heart to grind out tough action. SVB and Shaw both quit during matches from what I understand.