is legit for one-half of open source, for sure. the other half is funded, COSS-by-design companies that do scale on product and the paid companies that you are talking about.

something interesting you will notice even with those companies---GitLab, Hasura, Strapi, even Cal.com come to mind---is that they too get flak for feature-flagging, restricting paid features to closed repos for a period, and making choices that help them sustain. the beginning of open source led to a synonymization of the term with everything-free-forever and it continues despite the number of projects that have died or tuned closed-source and the founders that have stopped maintaining their repos.

weird how we'd much rather have projects die than advocate for their sustainability, but it is what it is.