There’s way too much hype over VPN Providers, but do not forget, you are routing all your traffic through their servers
As a general advice, if a VPN provider keeps logs of your activity, does not allow you to pay with crypto, and generally spends way too much on youtube ads is probably not an ideal choice.
Do not follow any advice/recommendation blindly, do your own research on which one offers the best service for your own needs.
The have voucher codes you can buy. Not quite sure if you will find them anywhere to buy in cash tho. Personally don’t care too much. Using a VPN isn’t illegal where I live.