Re: Liability ?
Nah, they don't count. Using a computer, see. Totally different!
Advertisements in newspapers that might otherwise be mistaken for editorial content are required to carry the words "ADVERTISEMENT FEATURE", in a font no smaller than the advertisement text. But on the Internet, there is no requirement to mark out advertisements from editorial -- and some Internet companies appear to be actively frustrating attempts to detect unwanted content. Which is not illegal, because it's not a printed publication and therefore not the same thing.
An app store isn't selling you a product; it's selling you a licence to use a product in certain ways and subject to certain conditions. And being completely different from an actual bricks and mortar store that sells product, they have absolutely no duty of care to you. Because everything is completely different if a computer is involved, and altogether different again if the "computer" happens to be pocket-sized. </sarchasm>