I think you could have easily assumed any word starting with @ is a twitter profile, especially if it does in fact correspond to an existing twitter profile.
Not being very thorough also allows people to self-exlude from the listing. Which seems be in the interest of some.
That's a great point. Can you post info on the site on how to be included or self exclude for those who have a twitter account? (I don't but have considered getting one. I would kind of like to know how to self exclude should I get one. I've had lots of issues over the years with unwanted, negative attention. One of my primary concerns these days is having some control over how much exposure I am getting.)
It is schedule every few hours. The biggest issue now is twitter limit request, which is what I'm solving right now.
Also the attention is not that bad (8775 visits so far). Also, heroku's varnish cache on static assets, html page and on Ajax requests is pretty great.
And mixpanel is handling the metrics, so I'm pretty covered.
Also, I feel left out. :P