I prefer IronSocket, based in Hong Kong. You may also pay anonymously using a giftcard from walmart, starbucks, etc. or with bitcoins. I wouldn't trust any VPN based in USA but I suppsoe it would be ok if you're not doing anything too bad.
I also wouldn't trust any VPN that says "zero logging". All VPN's log some sort of info but may not log "user activity". Timestamp of the connection to the service, duration of the connection (which is connection to the service), IP address used for the connection (to the service), and bytes transferred (which is via the connection to the service) - can still be logged
I also wouldn't trust any VPN that says "zero logging". All VPN's log some sort of info but may not log "user activity". Timestamp of the connection to the service, duration of the connection (which is connection to the service), IP address used for the connection (to the service), and bytes transferred (which is via the connection to the service) - can still be logged