Well, yeah.

Food only lasts so long. Money could be stored and used later.

So the exchange became a much better deal. In effect the females were always hungry. Because they could exchange money for fresh food later.

Makes as well could save up money so they didn’t have to get food whenever they were horny.

It really streamlined the process, but long term I’d be interested to see what happened to fitness of the population. Like 4-4 generations down the line, would that population be significantly less fit than a control group?

Although that would likely have to be done in the wild where threats are and not in a safe enclosure.