[jeffjose]

The difference is Google doesn't sell the data to other people. You agreed to Google reading your email when you signed up for the service, with Google.

Its like saying, my travel agent knows my travel plans.

unrollme on the other hand was asked to do a specific task. And while they were probably really good at it, they took it upon themselves to be curious and find more information, black out some and sell that info to others.

Its like saying, you travel agent sells the data on what car you came in, what you were wearing and what you were feeling when you came to discuss your travel plans.