I think my opinion would be the “free” in FOSS is not supported when a business monopolizes a community. That building a company to effectively control the project is at odds with a healthy open source community.
I hate defending Amazon. But if we think of Amazon as “in the Mongo community” then what Mongo, etc are doing is picking winners and losers in their community. That gets ugly, and creates a lot of incentives in that community for everyone to say “all hail Mongo Inc”. Effectively the community around the project becomes indistinguishable from the user community around a proprietary software. Everyone takes from the mothership, few give back, nobody questions or debates centralized decisions made, learned helplessness ensues...
I personally feel this is very counter to what FOSS is and should be. And I dont think it’s in the long term interests of the project, community and user base around the project