I am sure most of you here is familiar with the user Ali.Pi, with his infamous most submits and also potential cheating, but here's more, his contribution has miraculously became 66 while his fake profile has became 55. If you look through his blog and comments, you will notice that would contribute to such figure. If this is not convincing enough(due to possibility of blog deletion), here is a snapshot of their upvotes in web.archive(during 15/06/2017) with contributions 36 and 26 respectively. And in between, I am quite certain I did not see any blog posted by either of them which would provide them with such contribution.

I suspect that they get their upvotes by making a blog post and upvoting it before deleting it immediately. Would be great if codeforces admin can look into this issue.