Some sites match every single handle

No matter what is typed, these sites will match: Enjin, Fiverr, HackerNews, Quizlet, Smule.

Attempted with a couple of my actual handles (not sharing those), along with some handles I thought I made up, such as "crinklefoot" and "jinglejanglejones".

Also, the last handle - jinglejanglejones - doesn't show up on Fiverr, presumably because that's too many characters for a user's handle.