I've had a similar experience. A company I was trying to intern at asked me to write a rails app for them before they would think about giving me an interview. I wrote the app (which all-in took maybe 10 hours) and sent the recruiter a link to the heroku instance the app was running on and the repo on github.

I never got a response. I think three months later I might have gotten a one-liner saying they had gone in "a different direction" or some bullshit like that.

It's insulting and ludicrous for companies to treat prospective employees so disrespectfully.