On: Ask HN: My idea is already taken. What should I do...

[contechual]

Bit.ly does give analytics but it isn't as insightful as Google's.

It's sort of the same reason why, people love Kiss Metrics as opposed to using the internal analytics on a CMS like Wordpress.

Whereas Google's downfall is when you use their service, all URLs are public and can be traced to the source.

Hope this clarifies my preference.