I really want my $ back now.
It will affect how people perceive your product and your ability to continue to provide it. If they want to monetize, they need customers.
We're not talking about a major undertaking. Simply providing useful information in the main avenue they have open during the DDOS seems like a pretty straightforward thing to me.
Ironically, I came to ycombinator first to see what the status was and didn't even have to click through to "new". :-)