There were already plenty of users registered when I did that, including @IrZipher, @Caboose700, @Serjunpe and some others. Still proud to be one of the ones who joined that day!
Also I love remembering the first days of this forum. We were discussing the new forum software here, complimenting and complaining about things, for example for me, it was a bit hard to navigate with the layout at that time, everything felt so new and foreign. Oh, and in other threads, we were praising that we can use gifs as the user card and profile background. But otherwise everything went on quite normal, we were discussing random relevant stuff like the Steam Summer Sale at that time, games, and other things.