The developer who created the site works at Twitter, so naturally, he probably just asked his coworkers first.

This project was created by a Twitter developer. Of course, he asked his Twitter friends to submit their stories first. Since there's few stories for now, it looks that way.

Not sure if kidding but logic is inescapable!

A very interesting phenomenon indeed that all these, excuse my French, "rejects" wound up at TWTR, can we deduce something concrete from this about the company's hiring policy or offerings quality?

More likely that coworkers at Twitter are telling each other about this site and encouraging them to post.

Exactly. The first question that should be asked when people try to make generalizations is if sampling bias is accounted for.

Twitter didn't even send me a ping when a friend working there sent in my resume (for a role rhat at least on paper I'd be well suited for), but I'm moving through the interview process now with two of the GAFA constituents. shrug There's a big element of luck in this process, even if technical competence is a prerequisite.