How are url shorteners making money?
alabut: There's a lot of tinyurl clones that basically do the same job, only focusing on providing redirects for long urls, but one that does more and that I've liked a lot recently is http://tr.im - it got me to switch after years of using tinyurl, mainly because it carries a history of links you've previously shortened and shows some cool traffic stats for each one. So I can see them adding even more features for a paid pro account.