I like Matthew Butterick’s approach. He sells whole families at a time (on a pay-once basis), offers discounts if you get the whole library, and the license is short, to the point, and reasonable: https://mbtype.com/license/
Thanks for the recommendation. That's truly a no bullshit licensing approach. Wish everyone would do it that way.
https://en.m.wikipedia.org/wiki/WTFPL
And yes, I also wish everyone used this license everywhere.