Currently Proton has Monthly, Yearly and Bi-Yearly Plans, I'm proposing a new Plan to include 5 Year plan at a small discount compared to Bi-Yearly pan for users, like me, who are willing to opt for such plans.

Also Please give the option to stack the same plan(up to a certain limit of course) if possible, so that users can get the option to buy these plans when they are at sale like Black Friday or any event.

Thanks.