1. As parallel commenters have pointed out, no. Plenty of open source developers exist who aren't interested in getting paid for their open source projects. You can tell this because some open source projects sell support or have donation links or outright sell their open source software and some do not. This line of thinking seems to come out of some utopian theoretical world where open source developers shouldn't sell their software because that makes them sell-outs but users are expected to pay them anyways.
2. I do love the idea of large companies paying for open source software they use because it tends to set up all kinds of good incentives for the long term health of software projects. That said, paying open source projects tends to be comically difficult. Large companies are optimized for negotiating enterprise software agreements with a counterparty that is primed to engage in that process. They often don't have a smooth way to like, just feed money into a Donate form, or make a really big Github or Patreon Sponsorship, etc. So even people in large companies that really want to give money to open source devs struggle to do so.
I think I fully agree, although to expound on (1) I don't think that is the kind of software that any company should want to depend on for anything remotely important. I'm sure there are counter examples where you get a high quality project that doesn't require or accept donations, but I think these will be exceedingly few and far between. It seems like it's in the company's best interest to make sure the development for a dependency isn't going to go away for lack of funding?
1. As parallel commenters have pointed out, no. Plenty of open source developers exist who aren't interested in getting paid for their open source projects. You can tell this because some open source projects sell support or have donation links or outright sell their open source software and some do not. This line of thinking seems to come out of some utopian theoretical world where open source developers shouldn't sell their software because that makes them sell-outs but users are expected to pay them anyways.
2. I do love the idea of large companies paying for open source software they use because it tends to set up all kinds of good incentives for the long term health of software projects. That said, paying open source projects tends to be comically difficult. Large companies are optimized for negotiating enterprise software agreements with a counterparty that is primed to engage in that process. They often don't have a smooth way to like, just feed money into a Donate form, or make a really big Github or Patreon Sponsorship, etc. So even people in large companies that really want to give money to open source devs struggle to do so.