Heroku was acquired for $212MM with a 400x return to YC. I wouldn't exactly call that a baby buy with a small return from a $20k investment.
With regards to the other acquisitions I was highlighting that YC is actually successful without the need for the huge IPO with billion dollar exits. It doesn't need them in order to survive in can happily have $XX Million exits and be hugely successful.
However, they will have those billion dollar etc exits soon as you can see from the likes of some of those companies I listed such as DropBox, AirBnB, Stripe etc.
With regards to the other acquisitions I was highlighting that YC is actually successful without the need for the huge IPO with billion dollar exits. It doesn't need them in order to survive in can happily have $XX Million exits and be hugely successful.
However, they will have those billion dollar etc exits soon as you can see from the likes of some of those companies I listed such as DropBox, AirBnB, Stripe etc.