The entire article is FUD – the license is rather clear in indicating that as a condition of using AWS you promise not to bring IP lawsuits against Amazon, the duration bit is only too long if you don't read that clause all the way to the end, etc.
This is easily explained by the attribution:
“Bart Eppenauer, former chief patent counsel at Microsoft and now managing partner of law firm Shook Hardy & Bacon’s Seattle office”
A quick search leads to http://www.shb.com/news/2013/11/shook-to-open-seattle-office... which suggests that their Seattle office was founded to expand their IP practice:
“Eppenauer has served as chief patent counsel at Microsoft Corp. in Redmond, Wash., since 2003. In that role, he led the Patent Group in the Legal and Corporate Affairs Department, where he developed Microsoft’s patent portfolio of over 35,000 issued patents worldwide and managed a team of more than 100 patent professionals offering patent counseling and product development support across all of Microsoft’s business and research divisions. With extensive experience in complex, multilateral IP transactions and license agreements, Eppenauer has also worked closely with government and judicial officials, academics, and industry leaders worldwide on IP policy issues, in addition to participating in the recent passage of major U.S. patent reform legislation.”
So we have an attorney leaving a company with a track record of aggressive IP enforcement to open an IP-focused office for a law firm which does things like send people to chair conferences on monetizing IP (http://cf-conferences.com/conferences/ip-strategy-seattle-20...) telling businesses that he's deeply concerned about their ability to hire people like them to bring expensive IP lawsuits.