The remaining 9% though (that YC leaves on the table) could be worth at least $100k during next funding round, probably more if you expect to be successful.
> This should help you to launch the first version of your product and to test your initial hypothesis about the market before (potentially) raising more funding to grow the business.
They are shooting for helping companies who know what they need to execute do it fast and not worry about the rest, at least for a bit. After personally going through almost 6 months of angel investing diligence hell to get a similar deal, this is completely something I appreciate.
It's definitely good to have these options, so people can make better choices for themselves / their needs - and hopefully be able to get access to what they need. :)