[rodyancy]

Consider what this guaranteed $150k will do to other incubators. YC is going to be so much more attractive to other incubators, the best startups may not bother to apply to other incubators.

Sure, there will be winners that go through other incubators, or no incubator at all, but this is definitely going to tilt the field towards YC.

[jacquesm]

YC still has limited capacity so that point is simply not valid. If you're not one of the lucky few to get in to YC and you want to do a start-up then you'll have to do without them.