IVPN vs Private Tunnel

They are kept for troubleshooting reasons.

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You can switch between a single VPN connection (singlehop), or routing your internet traffic through multiple VPN servers (multihop) at any time. The latter increases anonymity, but comes at the cost of a slightly worse performance. Furthermore their multihop system has a built in restriction that dictates that it must be a hop from one country to the next, so no Dallas to LA hop, but because of this there should be nothing too shocking about the overall latency. NY - Toronto - London can still edge under 100ms, LA - SLC - HK hitting 350 - 380ms is pretty normal for everyone. A single hop from Brooklyn to Jersey can be as low as 7ms, with 20ms to Atlanta.

To further the point, really this means that if you route through a US node they may throttle you, but it may help to be on a private tracker. It certainly wouldn't affect you if you're connecting from a peer through Canada or Bucharest.

Except for BitTorrent in US, you can use any and all protocols at your disposal, no traffic is restricted.

Downloadable clients for OSX, Win, iOS and Android.

There are many great month to month or annual VPN offerings, but Private Tunnel is (AFIK) unique in offering pricing based on a volume. This is a excellent option for those that don't need regular/frequent VPN service. Prepaid packages never expire and can be used on multiple devices.

Offers a free 100MB package to try out the service