Amazon Web Services (AWS) is the gift that keeps on giving to Amazon. Reporting on quarterly earnings Thursday, Amazon reported $2.89 billion in AWS revenue, up from $1.8 billion last year, putting AWS on track to top $10 billion for the year. More importantly to Amazon's overall business, however, AWS drove 56% of all Amazon profits, gifting the company $1.78 in earnings per share—a massive jump from $0.19 last year. To quote Accenture managing director Mark Sullivan, the forecast for AWS is "cloudy with a chance of extreme revenue." Not to mention ever-improving profitability for the retail giant.