A monthly amount from the people who keep coming back, alongside the one-off boosts that already exist. Boosts are perfect for “I want this specific thing” and useless for planning: your income restarts at zero every month and depends entirely on whether anyone felt like it. A recurring option gives you a floor to work from. Monthly supporters would get their votes weighted, first sight of new ideas, and a named place on the board — so it is worth something to them beyond the goodwill.