Solving that discrepancy isn't going to be done in an HN comment; it's the Great Work of capitalist statecraft.
You’re taking an overly reductionist view, incompatible with things like “equal pay for equal work.” He definitely deserves to get paid for his work, and it’s obviously a matter of by whom, and he’s fed up with giant corporations using his stuff despite being able to pay him, and he’s totally in the right even if he’s insert-some-undesirable-here.
If you want to sell something for money, you put a price on it. And people decide to buy it or not.
If you give it away for free, going back after the fact and asking for a donation is fine. But I don't think it's required. And it doesn't make people who choose not to donate bad in any way.
He should probably figure out his next business and get to working on that. Start a business, sell a thing, profit.
Even if Marak was a jerk or a liar, he still deserves to be paid!