Even Mediatraffic and Musicharts are more reliable than them. I mean at least they are transparent about their sales tracking methods and also give us a top 40 list.
But while I can point it out, I'll re-assert my 8.5 million theory for WFL.
8.5+ million doesn't seem unlikely either but I was taking into consideration that it was released in September 2011 and impacted in 2011, having advantage over the other singles in this top which only impacted inside 2012 unlike 'We Found Love'.