I'm never a fan of giving up equity in exchange for short-term services, rather than a long-term commitment from an employee or investor.

I wonder if you would have success attracting high-potential startups. It would seem that most of these are able to raise money for the needs you talked about, especialy since it appears easier than ever to raise a small seed round.

As a result, you could be left with mediocre to low-quality startups only which threatens the model.