@steemcleaners doesn't upvote itself. I'm not sure it's ever upvoted with Steemit delegation. Same with @spaminator. That's been the policy all along. The stake is used for abuse mitigation, ie downvotes only. This has the effect of returning rewards to the pool.

Other delegations to accounts that upvote have the effect of disenfranchising and diluting the influence of people who have earned, kept, and powered up their stake. It's those delegations that should be scrutinized with care, because if they aren't adding a lot of value to Steem, they're taking it from the STEEM market.