I've kind of gotten tired of diving into the whole "yelp extorted my brother's cousin's friend's coworker's business for better ratings" anecdotal story schtick so I'm just going to link the above -- or are you suggesting they're getting away with lying on official communication? If yelp is altering reviews for paying clients, please show the evidence as I have yet to see anything but anecdotal stories about some folks getting a phone call from someone allegedly from yelp allegedly having the power to do this. I suspect, at worst, that they either misunderstood the sales pitch or were contacted by a scummy SEO-like company.
On the mobile experience, what are you referring to? The mobile site is fully functional with reviews, search, ratings, etc. I can't say the same of Twitter, Tumblr, and most major other sites. I despise mobile apps as much as the next person but I hardly see how Yelp is unique or even worse than others here. Please clarify.
You literally do not need the mobile app or even render the desktop site to read full reviews. I'm looking at a fully expanded review in mobile safari right now.