I like the Uber concept and like most people I know, can feel for people having troubles with taxis. But after I noticed the 3rd invite-to-uber link I got worr

I like the Uber concept and like most people I know, can feel for people having troubles with taxis. But after I noticed the 3rd invite-to-uber link I got worried that this is just a piece of marketing. The count reached six and the closing words were again a call to action to sign up. A quick search seems to indicate that you can get benefits from the company, if you invite new users. Which someone is _desperately_ trying in my opinion. A disclaimer would've been appreciated.