New payment methods for Brazilians
Perform the integration of a Brazilian payment system to facilitate payment and not require an international credit card, they could use, for example, the payment gateway of the companies Cielo, Rede, Stone, GetNet, Mercado Pago, in addition to PIX (cash payment, has instant confirmation in less than 10 seconds) and Boleto (confirmation within 3 days).
I open this suggestion because I recently had my account suspended for a few days due to difficulties in making my payment with cards issued in Brazil (National and International debit and credit) and I also faced difficulties when trying to pay with PayPal, for some reason the payment gateway they currently use did not accept my payment information and I was only able to regain access to Proton services after paying with Bitcoins.
I take the opportunity to stress the importance of accepting payments with PIX.
PIX is a cash payment method that does not allow reversals unless requested by the recipient, it is similar to a bank transfer but with instant confirmation, it is much faster than cryptocurrency payments, the payment process and confirmation takes a maximum of 10 seconds.

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imnotpolar commented
This is a crucial addition to proton for brazilians.