Screw him.
"Paul Allen, the co-founder of Microsoft, says that in 1982 he overheard Bill Gates, the other co-founder, discuss with Steve Ballmer, now the company’s chief executive, how they could reduce Allen’s share in the company by issuing themselves stock options. [...] Allen’s illness was Hodgkin’s disease, a form of cancer, with which he had been diagnosed earlier that year, and which has always been understood to be the reason he left Microsoft."