[m-p-3]

They're free in term of money, but the cost is that the provider can sell your privacy to the highest bidder.

[ForHackernews]

So the same model as Google and Facebook?

[sct202]

Google and Facebook sell access to you on thru their ads. The advertiser doesn't get your information. The free VPNs are probably selling your information, browsing history, and anything else they can get on you.

[yorwba]

Facebook used to run one, Onavo: https://www.fool.com/investing/2018/12/05/facebooks-onavo-sp...