If that was an option, he wouldn't be in YC, half-accidentally or otherwise. Nothing against YC here, but long-term steady-state isn't what they're looking for. Remember that next time you start using a VC-funded tool.
Again, how was that not an option? Why did he have to get into YC? What's wrong with telling them that the type of unsustainable growth isn't right for their business now that they've had a chance to look at things?