Display name vs actual user ID, right? You can change your display name to whatever but the actual account name will be the same. Kind of insane that Steam lets you change quite so much in one go without flagging suspicious behaviour though.

I just started typing in common video game title words in Steam's search, and I found several games just called "Void". We can extrapolate that scenario out and say maybe a new game is the first one on Steam to be called Void, but maybe there was an old DOS game called Void that came to Steam later after rights issues have been resolved. There's also the very common situation of a remake and its original version both being available on Steam, and maybe different companies own the rights to each one, like Star Wars: Battlefront. Perhaps these and other reasons are why those checks don't exist, but maybe they will now if these sorts of scams become more common.