Disclosure: I work for a company with a free downloadable software package, paid plans, and write a lot of open source around it.
I wrote about this conundrum a few years ago: https://www.mooreds.com/wordpress/archives/3438
OSS is a great way to build a community, increase adoption, and get attention. It isn't perfect at that, but it beats alternatives, for devtools at least.
But then you need to make money (especially if you've taken VC).
That's when the problems start. It's hard to make money on OSS unless you are using it as a complement to something you can sell. Especially in the age of hyperscalers.
And, as other posts indicate, switching from OSS midstream burns any goodwill you had when you started, and opens you up to forks.
It's not unique to OSS, though. Even devtools that cost money or are free but not OSS run into issues making money. Devs are a hard audience to sell to, in my experience. I know I am stingy.