Paid VPNs generate money from users subscriptions and not ads and selling of customers information.
Tor is the best for privacy but can not be used to access some sites. It is free and I use it to access any site I can use to access but use VPN for the sites I can not use Tor to access.
I'm fine with ads, but selling of customers information that's too much. By the way, I think it's illegal, no?
I'm using Windscribe. They have both paid and free version, and for me free version is enough. I hope they are not selling my information to anyone. At least when I google about it I see "Windscribe is a decent VPN" and no complaints about them selling anything.