[ajconway]

Tor can be embedded into an application. Sadly, the service quality over Tor would be much worse than over a regular Internet connection.

[_v7gu]

So can VPN's! There is a reason why Opera still has market share in some countries.

[ajconway]

Using a VPN given to you by a service provider from whom you are trying to hide your IP seems to not achieve the goal.

Letting users select their own VPN before using your service is too much friction. The advantage of Tor is that it's run by multiple parties and does not need any interactive setup.