> As an open source project no one is forcing you to maintain it.

Absolutely true. For maintainers willing to abandon their project because they tire of maintaining it, this is a totally viable alternative. Just ignore everything you don't want to do.

However, the maintainers I know care deeply about their project and making it useful. However, when their project becomes successful, the scales tip, and maintenance becomes a real burden. They could just walk away or ignore things that are failing. Or they could set up a Maintenance Fee and those making money using the project's binary outputs can help offset that burden.

It's one more tool in the Open Source Sustainability toolkit.

> The sponsorship seems to introduce a business model around what is FOSS, then it’s not FOSS anymore.

That's not true. I worked very hard with our lawyers to make everything copasetic with OSS and FOSS.

> I think the outrage is unwarranted.

I've seen no outrage. Actually, I've seen quite a bit of support for the idea, I've heard a number of good clarifying questions, I've a few complain that this is bad for OSS or something. It's been surprisingly great actually. :)