Ok so the advertiser route is a no-go. That’s kind of a relief actually.
What about funding Outernet in two ways?:
Donations
And mining crypto currency on the side like Bitcoin?
Make sure everything is legal, of course and set up a bunch of computers and let them mine Bitcoins all day.
EDIT:
I guess I should have done a little more research before I suggested mining Bitcoins. From what I learned since making this suggestion, that’s a horrible idea. It’s doubtful you’d even be able to recoup the money it would cost to run the computer(s) to mine any cryptocurrency.