serious money

また出た！serious!こういう英語はなかなか書けない。だからこそ英語の落ち穂拾いはやめられましぇ~ん。言葉の森から抜けられません。これseriousですよ。「冗談ではない！」。（UG）
cf. http://d.hatena.ne.jp/A30/20100606/1275813903
Revealed: the YouTube rich list
For many it's a source of fun, but for these 10 people the video-sharing website is a serious business
By Jonathan Brown
Millions of people watch them each day around the world. Their audiences are young and tech-savvy and most people over 30 would be forgiven for never even having heard of them.
New research has revealed the names of the ten highest earning independent acts on YouTube. True their earnings may be miniscule compared to Steven Spielberg, James Cameron or Ben Stiller, but they have done something which for a long time nobody in the mainstream media industry believed was possible – turning what was essentially a bedroom hobby into serious money by uploading video or vlogs (video blogs) on the site.
It is estimated that 60,000 new films a week are added to YouTube – the equivalent of 12 hours of footage joins the world's most popular on-line video community each minute. But there among the vast digital landscape of bad lip-synching singers and unfunny TV bloopers are some emerging stars yet to be snapped up by an established media company or brand.
http://www.independent.co.uk/life-style/gadgets-and-tech/news/revealed-the-youtube-rich-list-2062197.html