Organs is right, you are wrong.
Organs presented cat as a 3 letter username as an argument to your post. Why? Because cat was a namechange from User. So therefore, your post wasnta completely full answer.

From what I learned there used tobe a glitch that could get you around the 4 letter minimum in the past. Supposebelly, you can now do it with the Client. And as far as I know, if you have done something usefull for toribash, TB community etc., than you are allowed to get a 3 letter username.

I am not saying that this is true, but thats what I heard.

So the old account will be deleted right?

What if said account has less than 50 Qi and never been active on forums?

no.. it wont be deleted, the name will be changed.

like, if I were to change my name to doctor, the original owner would get his/her name changed to something like doctor_old

Oh okay. Thanks for explanation.

You can take the name of a perma banned player?

You can take any name as long as the acc hasnt been used in 3 years c:

Aww :_(

So i want to change my name to Universe, or if that's taken/used, change it Unity, and if thats taken idk, change it to, Legacy or Legend.

Universe is available. Please PM an administrator telling them what name you want along with sending them the required TC amount (100k for the first namechange, doubles every time after that).

It's the same as getting 2 name changes. So if it's your first name change on both accounts, 200k would be the price.