Probably cause piotr votes with his own account first:

and hey that's all fine, if you have trails and other accounts that follow you you're abiding by the rules of the blockchain (which will go linear in the next HF, though) and as a curator or curation project you may deserve those extra rewards for your hard work, curie has a big trail too, but trying to push your returns with this scheme, at the cost of authors and getting an edge over all other accounts on the blockchain this way by literally self-voting? Yeah, how about no.