You can use cash to buy gift cards, then fuel your account with 3rd party gift cards.
https://www.privateinternetaccess.com/pages/gift-card-payment
(Not the most economical, but a good way to bootstrap into a VPN if more traditional payments are not available)
PIA takes bitcoin, i’ve used it myself before. easier, cheaper and less risky than sending cash in the post
You can use cash to buy gift cards, then fuel your account with 3rd party gift cards. https://www.privateinternetaccess.com/pages/gift-card-payment (Not the most economical, but a good way to bootstrap into a VPN if more traditional payments are not available)