Complying with the FTC's requirements, every sponsored conversation must include a disclosure. Publishers and Developers using Review Roster are required to disclose the deals.

"When there exists a connection between the endorser and the seller of the advertised product which might materially affect the weight or credibility of the endorsement (i.e., the connection is not reasonably expected by the audience) such connection must be fully disclosed.", says the FTC.

You can learn more about the FTC's details here -

http://www.ftc.gov/os/2009/10/091005endorsementguidesfnnotice.pdf

Video Reviews - Every sponsored video review should clearly mention that it is "sponsored".

You can also use the below image -

Review Roster has been designed to simply speed up the review process. It connects developers and publishers in the most breath-taking manner. Publishers are completely free to write what they truly feel about an application, and the review needs to be completely unbiased.