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Jerry's bot is subject to change at anytime without notice. It has only been running at that APR for a short period of time. Also, during that time he converted to JBC and did not payout for a few days before he relaunched the bot and cancelled JBC.

Thank you @fow for your comment and I agree that APR can change for all bots in a given period of time. It all depends on bot usage, value of Steem and SBD, etcetera. I may write a second post in a month's time to see how it goes or you might write your own.

This post is not a question of supporting anyone and I am not interested to read posts and comments on Steem that attacks others. My case study shows the fact for a week period and that's all.