>>>> _Everyone_ is collecting our data nowadays. Who's left to sell it to?
I confirm that he is probably right about _____collecting____ data. Yes, this most definitely includes FOSS software. If your qualifier for FOSS is not using GA or anything like that than your are right, however, most of probably still count brew as FOSS. Hope that helps.
Also note that while Homebrew may be open-source, it is not "free software".