Came across this article today. I think AirVPN runs Tor nodes, right?
"Tor avoids using more than one relay belonging to the same operator in the circuits it is building."
...but Tor isn't aware that my first connection to the internet is over VPN. So if Air is my first hop, and Air is also operating an exit that I connect to; they've become the first and last hop. This could expose Air users to correlation attacks.
"It is possible to host Tor relays [any… bridges, entry, middle or exit] behind VPNs or tunnel-links. For example, there are VPN providers that support VPN port forwarding. This is an interesting way to contribute to Tor while not exposing oneself to too much legal risk. Therefore, there can be situations, where a VPN or other tunnel-link and a Tor relays could be hosted by the same operator, in the same network or even on the same IP."