because i would be biased to the half dozen i actually tried
i can confirm mullvad is great for privacy, but they are expensive.
(mullvad also uses a ridiculously higher encryption level than most)
for a single vpn user, ibvpn is just as private and the cheapest.
airvpn costs a bit more, is private, and allows for multiple vpns.
i've used all three for over a month, and did multiple p2p ubuntu
download tests, and all three have great availability and speed,
whether you use their clients or a generic openvpn install.
one provider I have used that made TF's list to be avoided is; TorrentPrivacy
their network performance is terrible, and their vpn client is a resource hog,
but since they only required an email address, i guess they are private