Once I detached myself from the project, I took a good look at my financial models. For every $50 the client took in bookings, they had to pass $30 to operators, spend $9 on marketing, 5$ on refunds, and $7 on overheads.
The assumption was while operator payouts grew linearly, marketing, refunds and overheads grew sub-linearly. There is going to be this nice breakeven point when everything is going to make sense, if only they procure enough capital to get there.
These Uber for X / Casper for X business models are all largely dependent on this belief being true. Whether that's the case or not depends on the unit economics of the market in question. The only way to know for sure is to run experiments.
That, I believe is what easy money has allowed in the US - mass experimentation. In my home country, we don't have the resources to even attempt to find answers to such questions.