read.cash is a platform where you can earn money for your articles and comments. You can get paid upvotes
from other users or just earn points for writing articles and comments, which are converted daily to
Bitcoin Cash (BCH) cryptocurrency, which can be used on the Internet or converted to your local money.
Go to shop.protonmail.com, scroll down and click on one of the available gift-cards you can print at home.
Continue to checkout as usual, fill in your Details and then continue to the Payment selection. You will be presented with this screen:
As you can see, we can pay using coinbase Commerce, so select coinbase Commerce and continue.
The following images speak for themselves:
You will then receive two mails, click on the one from "SendOwl".
The mail will look like this:
Copy the "upgrade code" and go the "Use giftcode" as shown below.
Paste in the previously copied code and click on "APPLY".
And you will have successfully added balance to your Protonmail-Account using Bitcoin Cash!
Additional Note: It seems like my previous Euro-Balance was 1:1 converted to USD, i reported this as a bug. I will update here once i hear from them. But this shouldn't be a problem for someone with no balance to start with or new users.