Reviews invited

Trawling the web, it seems that many people just pay people to read their books and review them. I can see the point of that as it does take quite a while to read a novel. But most writers I know can't afford to pay dozens of folk to perform this service.  We are told so much about viral campaigns, but I am wondering whether the world has reached a tipping point of clutter?  What do you think? Are people too distracted to sort the wheat from the chaff?  It takes a long time to get through emails, tweets and so on in a day. Distracting from the job of actual writing! If you know of any shortcuts, please let me know.