https://www.gnu.org/philosophy/selling.en.html

You can do that without a copyleft for BSD types to keep your proprietary extensions secret & harder to copy. Doing it for either is a good way to make profit or just raise development funds.

Regarding percentages, I think that's an interesting idea but worry about scale. Systems nowdays are getting big and full of components. More complex, but useful, software might get less market share due to penalty of high price. Maybe institute a cap for upper limit of a single component's license. Might be specific to the component or in general. Personally, Im leaning towards simple, annual licenses integrator pays per component. Might get each free for a year per startup so they can make some money. Crowdfunding, nonprofits, or corporate sponsors could help larger ones get started.

I don't quite follow I have to say. The distribution part of software can be rather trivial for niche markets where there aren't any big vendors around - with GPL I'd have to assume that I can only sell once and then the customer will just redistribute it - whether free or not - to whoever wants it, at the very least within his/her organisation.

> Systems nowdays are getting big and full of components.

I think it would actually encourage to have a nice long thought about what dependencies you want to introduce. Market would probably sort that out rather well, and things like the node.js dependency hell would not happen in such an environment. You'll first start with a language that comes with a rich standard library in the first place.

Edit:

> You can do that without a copyleft for BSD types to keep your proprietary extensions secret & harder to copy. Doing it for either is a good way to make profit or just raise development funds.

Yes, to me also this seems to be the best way forward with commercialising OSS without going the service route.

Many enterprises won't buy something at all unless there's a price attached presented by a company they think will be around a while and help them with any customization. This market is less likely to trust a competitor to Windows Server or Exchange if it's being offered for $50. ;) Plus you can point out it's better to buy the real thing supported by developers that invented it instead of cheap knockoffs. Call them cheap knockoffs.

So, there's some risk but it can be done. Best model is having some proprietary addons, though.

"I think it would actually encourage to have a nice long thought about what dependencies you want to introduce. "

I thought about this as I wrote it. The reason I didn't add it is because you'd have two, competing solutions: FOSS community that mixed and merged no matter the size; shared source community where things cost more as complexity went up. I figured the latter would be largely boycotted if former was available. The former has so far been fine for vast majority of freeloaders. I doubt that would change. The latter could become a niche market with low complexity a differentiator, though.

"Yes, to me also this seems to be the best way forward with commercialising OSS without going the service route."

It's what I'm going to do. If money rolls in enough, I'll also submit select improvements and/or donations back to the source projects. Just on principle.

would be proprietary software you don't have to reverse engineer

>[AGPL + another] still allows any 'customer' to use your software for commercial work without contributing anything back other than attribution

How so?

AGPL doesn't have any mention of commercialization - you can use it as an end user in any context for free, but you will have the same issues with selling derivative works due to copyleft. For software that's actually just software and not a service, say media production, it means that *GPL software will forever remain tools for hobbyists.