Well you’ve got less of a capitalist filter on that than I feared but I think you’ve got the cart before the horse.

The parts that relate to open source are this: when you have riches, you share them. People making a genuine effort to reciprocate when they are able (which may be months or years from now) makes the social structure function (if you like, by the rule of large numbers - someone always has more than they need when others do not).

If you do share in kind, your social status is unaffected by this aspect of your culture. If you are consistently more generous, your status increases. Call it Bayesian if you like. He helped us in the past, he will help us again in the future, so let’s keep him safe.

If you’ve ever been nominated as a maintainer on someone else’s project, this is usually why. You’re one of the top contributors not already on the core team, and they either like you a lot, or the contributions from others have fallen off and even they know this is not sustainable, and you’re the next best option.

There is an element of gifts given to strangers, which I’m claiming should also show up in how you receive “visitors” to your project, but I think outside of fiction this is typically set at a best effort level. It’s acceptable to set it at the “decency” level discussed elsewhere in this thread. But a lot of people don’t and then yell back when people scold them for it.