Hi @pearltwin
We are returning 100% of STEEMs and SBDs sent to bot for post promotion. We are not powering down, so curation profit stays on bot account. It increases the return for delegators, because its SP is using for promotion too.
But, at the moment, a-bot owner @drorion is returning every day 20STEEM from his profit to the bot. Which is more than curation reward.