Earlier quoted context omitted.
I think real capital Open Source is what matters here. In that case, anyone can fork and redistribute the good parts of any plugin. In the case here, someone owns the code and reserves exclusive monopoly and that's what gets bought out and that's harder to revert or fork.
That is true, but the OP was referring to the ability to inspect code for security and/or privacy problems, so you can decide if you want to run it. Just getting the source code is adequate for that.
Indeed, but my OP he was replying to was that true Free Software matters, because the whole buy-out of the plugins wouldn't even happen like this then.