No, not on steemit.com, anyway.
While steemit.com fails to offer a max-payout UI option, here are a few workarounds:
- Keep posting, let it self-correct. If the reward really is too high, it's not like it's your fault. People should pay attention and fix their curation logic.
- Use Decline Payout every so often so that over the course of many days, your payouts are limited.
- Start posting with streemian.com (Scheduled Posts) and set a Maximum accepted payout in the Advanced Options.
- Use my ruby script to post, which also allows you to set a max payout.
Nice answer - I'd never explored the scheduled post feature on streemian thanks for the heads up :)