It seems they still do: https://protonvpn.com/support/vpn-bitcoin-payments/
Bitcoin is not available as a payment method during account sign-up, though it can be used to purchase account credits once you have created your account. You can then use those credits to purchase your Proton paid plan.
Maybe it’s just not available on their mobile web app? I see it when I login to Protonmail (I don’t use the VPN though):
Bitcoin is not available as a payment method during account sign-up
Typical Proton marketing privacy and whatnot and then proceeding to identify all users.
You can create a free account at first and then upgrade using bitcoin.
Nope. Let’s jump to conclusions and shit on Proton without doing simple research on the issue. Looking at the above comments