Earlier quoted context omitted.
Sure, but for almost everyone, there's a dollar figure at which they're willing to stop having fun and start making money. Maybe that dollar figure is $1,000/hr for some open source maintainer out there (I bet it's much lower for most of them). Why not put a line in the readme which says, if you want to commission a specific change, send me an email to discuss, my consulting rate starts at $XXX/hr. Or there's a $YYYY…
I imagine if someone is willing to pay a maintainer $1000/hr (implying they are that desperate to hire someone), the maintainer wouldn't need a line in the readme to hear about it. As someone who tried their hand at doing paid "consulting" work on an open source project i contributed to (just very briefly when i was between jobs. I wasn't very succesful at it. Nobody offered me $1000/hr) most of the jobs were very sm…
It did give me some perspective on running companies, negotiating contracts and billing with an hourly/daily rate vs fixed price per contract. I would certainly increase what I was billing by several times were I to repeat it, but having a sustainable source of business before starting would also be something I would factor in.