I quickly put it under MIT, which means though I never saw changes back - something I did helped somebody else teach a class of people HTML. That's doesn't put food on my table, but the same effort from me under a bad licence would have meant that good likely would not have come from my efforts.
If you can have passive income projects that sit there and generate revenue over time without further input, why can't you have passive charitable giving, where you put in effort once and others are able to get value from it over and over again as time goes on.
Permissive licences pay it forward in a way that viral licences don't.