Using bots to level up

This thread's prefix can be for info and as a discussion as I'm unaware about some aspects of this method.

So about a month ago before I got banned I was playing at like 3am with bots, obviously this meant that I can be obvious af right? Ultimately resulting in a much quicker rank up (I got from rank 1-3 in about 2 hours). Is there any way to search for Valve servers which have no players on during the day?

I did this in Demolition servers

yes you can do this easy, for me I have a bad sleep schedule so I sleep when everyone is on and play when no one is so I get alot of empty servers doing op blood hound missions with bots and still get xp really good way