Linkbee shares its ad revenue.

Linkbee is a URL shortening service that can be used with blogs, forums, websites and Twitter.

Linkbee provides the following features.
Short URL Creation
Real Time Analytics (what is that?)
Photo sharing in Twitter
Bookmarking
Referral Program

In short, this is what I could understand:
You are paid to social bookmark using their service to shorten the links you want to bookmark.

For my standard, their revenue sharing rate is abysmally low. Another factor is their pay out rate for most of the countries including India which is almost insulting.

I don't know the reason behind this partiality.