http://www.telegraph.co.uk/football/2017/03/08/madridification-barcelona-barca-went-mes-que-un-club-just-another/
Madrid discovered this. Now Barcelona are discovering it too. Some seasons they will win everything. Others they will win nothing. But as long as the club is run sensibly, even their years of failure will constitute relative success. Here again, the United model is instructive. On the pitch, it has been a pretty wretched few years: a teetering spiral of decline, degradation and David Moyes. Yet on the balance sheet, they have still managed to grow their revenue for 12 straight years in a row, Champions League or no Champions League. If this is failure, then every club in the world would love a piece of it.