Ad blockers at the servers
Ad blocker at the servers. As a benefit to you it would reduce data demand on your network. I am a paying customer. Perhaps you could make this a benefit for paying customers, and as a draw to encourage more to pay for the service.
I switched from Perfect Privacy to Vyprvpn. Im missing the Ad blocking which is integrated in the firewall from perfect privacy. I hope this feature will be added soon at vyprvpn.
This could be implemented like the NAT Firewall feature, specifically enabled or disabled per account.
It got a lot of traction, but GoldenFrog decided to implement it differently as part of the Android app and not at the server level unfortunately.
I'm a big fan of this as well. It would "add" speed by reducing total content delivered through networks.