So far as I can see, it's not possible to pay for a new or existing ProtonVPN subscription via BPay. This is somewhat limiting/inconvenient for those of us who don't shop online, have credit cards, or otherwise prefer to have as few bank cards/accounts as we can reasonably get away with. BPay offers a secure and convenient means to pay for services without needing a seperate card that, in some cases, will never be used for anything but those payments (ranging from once a month to once every two years).

To my knowledge, there are no disadvantages nor other reasons not to have this service as a payment option, and having more flexible payment options means more accessibility for prospective buyers.