Some accounts with low amounts of MicroCash will get low amounts or no amounts of the total fees paid back, who is denying that or misleading anyone? Every day every account takes a half cent (0.005) to cover the operational costs, whether the account is rich or poor this fee is taken. These fees are then redistributed back to every account based on how much MicroCash they have.

Nothing is stopping anyone from becoming a MicroCash holder and earning significant amounts of interest, they just have to sell products people will buy, offer services or invest themselves. People who have tiny amounts of MicroCash will pay an account fee just like someone with a lot of MicroCash will. If they increase the amount of MicroCash they have they'll go from paying a tiny fee to actually earning MicroCash, it's a nice reward system where people can escape paying fees.

As to how much reward is given back, it all depends on the total fees collected, which varies day to day. The more people use the network the more fees are collected and the more people are paid. Now users get indirectly paid for spreading the word about MicroCash to their friends and family.