Allow more than one free account in the app when signed in with a paid account
In the Protonmail mobile app, you can log in with multiple accounts at the same one, but only one of these accounts is allowed to be on the free plan, even if you have another paid account.
I understand the restriction when using only free accounts, but I already pay for my main account. I need to monitor two mailboxes of groups/organizations that I'm in. Both of them are on the free plan, which means I have to choose which one I add even though I pay for my main account.
At first as far as I remember the number of free accounts was tentatively unlimited, and now you can have only one (specifically to avoid bulk sign-ups and things like that).
I think there should be a maximum number like two or three, at least so that people can have one for general use to share with their friends and family with an easily remembered username (like their own name), and one more private address with a username that doesn't identify them.
I don't think people should have to choose between privacy and everyday usefulness, so limiting it to only one account (rather than two or so) I think greatly damages the image of Protonmail as both usable and private.