I've heard that some YC founders approached them about it, but the management of this structure may be more work that distracts YC from it's focus.
We hope every accelerator and VC film does this eventually, we want to power as many of them as we can under the hood.
and ya, that makes sense. it should be offered by YC and other accelerators, but it should be managed by alumni and pool members, not by the investing party.
We wondered the same. Can't speak for YC but we do understand that most funds would have trouble running this internally due to fiduciary conflicts of interest and management concerns.