It's so difficult with so many options and all these bullshit "discounts", coupled with the fact that different VPNs charge different prices based on what country you're connecting from...
What is the cheapest functional VPN you've come across? Bonus points if it supports IPv6.
Another vote for Mullvad, here. It's arguably one of the best VPNs out there and at 5 bucks a month, you really can't go wrong. If you want cheaper than that, you have bigger problems than a VPN.
Which is only really needed for hosting a torrent, something most people don't do. Most VPN users do not even know what torrenting is and most torrent users are leechers so they don't use it either.
I think Proton has a free tier. It would be the most legit free one. Otherwise the best VPNs would be Proton, Mullvad, and IVPN with their no log policies, anonymous account creation and payment methods, audit history, and legal track records
PIA is $40/yr and if you're just dodging hollywood lawyers, it is perfect for that. I can easily saturate my 1Gbps connection. It's a well known service so some companies block their IPs and you'll get captchas but I think that's unavoidable.
If you have state actors interested in your activities, keep shopping.