I will not name the accounts, but I have seen this case where this represents the outgoing votes of an account with 20k HP.
I have been watching this account, @enforcer48 knows who it is.. a load of votes came in again after 4 days. There's something fishy going on, add a nice looking young chick to do all the posting.. and you get the bigger votes as well as the account the same size of mine doing the 4 day delayed ones.
We could cancel out their self-votes, but some of us need to be careful as we have people following our downvote trail. Don't want to be seen as a bully.
I get a feeling that said Orca is the same person, which is effectively another self-vote. We can't prove it.. the fact that all this voting is done on days 4-5-6 suggests an attempt to hide it all.
It is suspicious, but I am wary of making allegations without proof. As I said, it's a fairly minor case, but they are still making dollars each week from it. I want rewards to go to those who earn them.
I personally think there should be downvote service particularly dedicated (I don't think there is) to issues like this. This is the kind of abuse that was going on on Steem. The more people start to see this as a community that thrives on engagement first and not financial gains (which is very important also), the better.