It’s always so annoying to see people FUMING mad at some organization for not *sponsoring* something that they like.
Side point: If someone doesn’t want a filter enough, and they’ll only get it if some random organization they don’t know pays for it – then the filter will probably do very little for them.
If you make people pay, then it has a lot more value. Even if a friend or relative gives them the money, they feel more indebted to let the fitler work.