Based on the letter, it looks like a weak statement by the FTC: if your application enabled third parties to monitor television-viewing habits of U.S. consumer

Based on the letter, it looks like a weak statement by the FTC: if your application enabled third parties to monitor television-viewing habits of U.S. consumers and your statements or user interface stated or implied otherwise, this could constitute a violation of the Federal Trade Commission Act. We would encourage you to disclose this fact to potential customers, empowering them to make an informed decision about what information to disclose in exchange for using your application. Note that there's a violation only if the developer's statements or user interface stated or implied otherwise. By my reading, if the dev says nothing and collects the data then they are not in violation; the violation occurs if they lie about it. Also, the FTC doesn't require the dev to disclose anything, they merely encourage it. However, I have no experience with these issues. Does anyone know more about it?