When it comes to cheaters, it's easier for triggerbots and aimbots to score in UL, because the client sends hit information to the server, instead of the other way around. With no lag delay, aimbots work better because they don't have to predict where the enemy will be.
It's also a lot easier to detect botters with Unlagged on, because they tend to accumulate higher kill counts in a much shorter time.
!Invisible mode helps with catching these types of people, because they don't know when and when not to cheat in our server.