yeah it's still a sort of new frontier but the patreon model I think really should be the way going forward assuming it's possible. everybody gets the content for free, but those who can afford to contribute do so. and to be honest, if you live in a 1st world country throwing a couple bucks here and there isn't that much to ask. for the same price of a lunch at mcdonalds you can give $3 a month for nearly half a year to Wikipedia for example