Earlier quoted context omitted.
Do you have a source that shows that popular VPN providers such as Mullvad or NordVPN actually sell your residential internet to third parties? That's a bold claim, but pretty scary if true.
yes, search for NordVPN vs Luminatti (guys behind Holla VPN) scandal: "nordvpn luminati lawsuit patent". Basically Luminatti, now known as bright data, reached out to NordVPN in order to utilise their user's internet as residential proxy nodes. NordVPN thought otherwise and created their own network instead (Oxylabs if I'm not mistaken). They are still in patent wars I believe. I don't know anything bad about Mullvad…
If you weren't you, would you trust your service?