The goal here is to reach investors that can lead series As. Doing that requires a fair amount of capital given that:

a) the average A last year was $8m and b) the lead is expected to write a check for the majority of the round.

I think that seed rounds are generally a better fit for the types of funds you mentioned. It's possible that these funds will develop over time to be able to lead As. I look forward to that happening and having them participate in YCA.