We have all heard about URL shorteners and how vital they are to the Twitter ecosystem. If they are, then why doesn't Twitter have its own URL shortening system? why does it have to rely on bit.ly and other services to do this? what if they go under or get bought by a spam company and convert every URL to spam or worse yet, to #*$!?
Seems to me although they use bit.ly, they realize that URL shorteners may not be the best long-term solution. I'm not a database person, so I don't know the storage implications - but it seems like shorteners will ultimately mess with search results. I want to know where a link is coming from (although I have no idea how prevalent this opinion is).