Kickstarter's got one, but it's invite-only right now. https://d.rip - I could find no sign of their fee structure anywhere on the site.
There's also https://liberapay.com - a non-profit Patreon clone, whose code is public. You may have to be creating open source content, I'm not sure. Seems to pay weekly, does not take any cut themselves (?!?!?).
I just migrated my two Patreon pledges to Liberapay, and it worked surprisingly well. You decide how often you want them to charge you—and then they re-distribute the money on a per-week or per-month basis to creators.
So you can choose to be charged every month (and have ~2% of banking fees), or to provide money for the next 3 months (and the banking fee will be less). Money will be redistributed to creators once a week (or once a month) anyway.
Plus they only charge banking fees, nothing for themselves (tip is voluntary).
