nanopool
First of all, I want to say that somewhere here in the threads I read that nanopool allows you to have an unlimited number of workers.
At first, there was one name for everyone, and on the first day on the nanopool I got 36kh, this is the maximum amount. After everything sank to 20-25 kh, I thought that the workers themselves left, for example, because of the antivirus. So, after a while, I changed the name of the worker from one to {computername} and kh increased at the maximum point to 50. Do you think this is an accident?

And one more thing: the workers have very similar names
They start with СDESKTOP plus random three letters.