These are active and responsible steemians that I trust. The first 4 usually vote for #cn posts. The last rarely vote but usually unvote to correct inappropriate votes, since he is a @steemcleaners member. The other 2 keys are owned by me.
If you have question about why the @abit account has voted on a post, please feel free to contact the team members. Specifically, @oflyhigh knows how to check which team member (or if it's me) did a vote, then it's best to directly contact that member. Perhaps @oflyhigh will public his tool so others can check directly.
Thanks for your support.