#4 Barcelona sold-out too
Prior to the 2011-12 season, Barcelona took great pride in having no corporate sponsors, unlike every other club. And it surely must have been gratifying to their millions of fans to know their team weren't sell-outs. However, the first time they made a move to change that policy was in 2006 when they signed with corporate sponsors UNICEF but instead of the organisation giving them any compensation, the club had agreed to donate €1.5 million a year to them.
However, after 111 years, the Blaugranas finally caved in at the start of the 2011-12 season when they signed a five-year corporate sponsorship deal with Qatar Foundation for €150 million. And now their sponsor from next season is going to be Japanese e-commerce giants, Rakuten.