People use a VPN for much more than browsing porn. Jsut because Pornhub is behind it doesn't mean it's limited to that.
And I care less about a Pornhub knowing what I watch - if anything ;) - than the Government, ISP, or anyone in a position of power. With browser/cookie fingerprinting PH probably already can id people reasonably accurately, VPN or not, if they wanted to.
Certainly, however I have to assume Pornhub is jumping into the VPN game because they realize a substantial number of their users use VPNs for exactly that.
It's not about anonymizing to PornHub, but about anonymizing to your ISP or AP.
And I care less about a Pornhub knowing what I watch - if anything ;) - than the Government, ISP, or anyone in a position of power. With browser/cookie fingerprinting PH probably already can id people reasonably accurately, VPN or not, if they wanted to.