Why is my account not Premium after adding funds to my Steam Wallet?

I have added funds to my Steam account and used it to buy a game (but I have not added it to my library).

I also believe I have been on Steam for about 30 days, as I have been playing since the 1st of July and it is now August 1st.

Why is my account still not considered to be Premium?


I am not 100% certain about this, but I believe that you account only becomes premium when you add a game to your library.