I don't know. As a customer, distribution of credits rather than cash back, especially with an outfit as...untried as this one, is enough of a red flag. The addition of a cap on use of those credits is a bridge too far for me.

And I think there are other, less alienating ways to accomplish its goals. Take 10% off the top of credits paid to the creator when someone books an empty on shared shuttles. Heck, a company confident in its solvency and profitability should be able to take that 10% and offer cash back, rather than credits.