Millions of companies use open source without contributing anything. I have a theory/daydream that:

a) a new foundation could be created with a new licence, whose only purpose is to accept payments and distribute them, with max x% overhead

b) that licence would stipulate that by paying a nominal yearly fee (e.g. 10 hours average developer cost in your country) you would get all-you-can-eat commercial use of such licensed software

would lead to software adopting that licence, companies paying that fee as a no-brainer, and in time would mean that those millions of companies would at least give some money, without warranty etc, that would be distributed somewhat fairly.

Which would no doubt be massively imperfect, but better than now.