Serious question. If you are devoting your working life (that is, time that would otherwise be dedicated to remunerative work) to OSS without compensation, then by definition you probably don't need the money, right? Perhaps because you are already wealthy, or have a family that will support you. There's nothing wrong with this of course, many of us would contribute to OSS for free if we didn't have mortgages and families to pay for. It's basically like doing volunteer work after retirement.
Put another way, are there many people devoting their entire working lives to OSS with no other compensation or resources, essentially going bankrupt to write OSS? I'd imagine very few people are in that category, or if they are, can't sustain it for very long.