Accounts "biyimi" & "precab" belong to one person.

"yellow74" is a different user but received the same list of accounts to follow and comment on from "biyimi".

I am sure that you have noticed that most of the comments on your posts have been coming from the same group of accounts.
They exclusively comment on accounts that guarantee upvotes, not just your account. They have a list of dozens of accounts that they comment on daily while ignoring the rest of the other Hiveians.
He keeps sharing this list with others, so others can join to farm the same list.