I'm thinking that it's legit, but hey you can never be too sure what's legal these days. It's only $15, just try it out. I doubt anyone will chase after you if you buy it. (Of course it never hurts to have an escape plan ready and a one way plane ticket to mexico stashed away underneath the floor boards or in some other secret location, you know.. just in case.. ).
In my emails with the guy who was selling it here, he signed off as zabs. Whoever runs pointproxy.net uses zabs in his email address and links to pointproxy.com as the demo. I think it was setup just like that when I bought it too.
Probably wouldn't hurt to email him at the email address linked to pointproxy.net and ask for more information and see what he says about your concerns.
.. and I think this support forum is meant for Will's proxy lists though, not for other people's.