The fact that they would not become Billionaires received much less of an adverse reaction than Max had expected. The whole reason that everyone wanted their children to join an ultra-wealthy family was to get them out of the chronically broke state that they were in as menial workers, not for the actual cash.
Therefore, the non-monetary benefits that the Reavers were offering them were almost exactly what they had always wanted.
Their planet was still working almost entirely with pre-civil war Kepler technology, which made it a very comfortable place to live, but even compared to what was the height of human civilization a few years ago, Absolution was a worker's paradise.