Everything2 did this with votes. I think the “votes per day” limit used to be more progressive by user level, but it’s possible that’s me misremembering; looking at it now, it seems like they have a flat 50/day once you reach the level where voting is unlocked at all. Here’s what looks like their current voting/experience system doc. (Note that E2 has been kind of unstable for me, so if you get a server error, try again after a few minutes.)
Everything2 did this with votes. I think the “votes per day” limit used to be more progressive by user level, but it’s possible that’s me misremembering; looking at it now, it seems like they have a flat 50/day once you reach the level where voting is unlocked at all. Here’s what looks like their current voting/experience system doc. (Note that E2 has been kind of unstable for me, so if you get a server error, try again after a few minutes.)