Currently (as far as I'm aware) the pools have a pretty even and fair distribution per unit of investment. This is a great system but the notion of a probabilistic return might deter some folks who are on the lower end of the economic spectrum. An idea to improve uptake would be to have some other pools that had a scaling factor that favoured the inverse of investment similar to quadratic funding.
You could set an lower bound for returns and also a higher bound. For example at the 4 USDC minimum the expected return could be something like 20% APY and then the scales work in such a way that the larger investors 100k+ have an expected APY of 2%. Theres obviously risk of gaming the system here if lower returns are too high but it would be possible to just limit this such that gas fees stop that from being a possibility. Theres also a potential that whales are less altruistic then would be required so may require some market research on minimum required return.
The benefit to the protocol would be a potential improvement in uptake while also providing a small means of support and onboarding for lower economic areas.