From the article:
"But the proponents of Open Access quickly realized that online publishing is not free, nor cheap. Management, equipment, and access costs add up quickly. [...] [PLOS] charges between $1,350 and $2,900 per paper, depending on the journal. In fact, many in the profession estimate that to be sustainable, the author-pay model will need to charge up to $5,000–$8,000 per publication"<p>WTF? $8000 per article would pay for each article to have its own EC2 instance for &#62;10 years, including bandwidth costs. Something not right there...