To be clear, I pay $20/mo for ProtonMail Visionary so I'm not averse to paying! I just can't see the value at $30/mo when the other family members don't use it nearly as much as I do.

Maybe this is an untenable problem due to your costs and you need those low use paying users. I'm not sure.

To clarify: by intermixed I mean our tuning was different so it became somewhat interesting, as we all wanted to tune the settings differently. It's not a huge thing, but between that and feeling bad for having three people using one sub...