I hadn't considered adjusting percentages, but I had considered allowing people to complain about and/or exclude websites from payment (veto, in your term). Ot

I hadn't considered adjusting percentages, but I had considered allowing people to complain about and/or exclude websites from payment (veto, in your term). Otherwise my inclination is to stick to a formula, because you have to balance the interests of users and providers for a network effect to form.