Getting people to pay for support they won't use sounds to me closer to a voluntary regular donation than it does the "long tradition of setting up a business, having invoices, and providing services for the pay."

I guess it's a way of making a voluntary regular donation seem like a traditional invoice to satisfy the bookkeepers, but that's not what I thought @mfer was getting at. And if it magically worked to produce what are effectively donations, we probably wouldn't be having this conversation. "

But yes, you are talking about something other than open source as the more likely future route, which is why i asked @mfer if they were! That's the straightforward way to get people to pay for software -- make it not open source, so they have to pay to use it.