I used Rackspace back in 2001-2002. Made the switch after hosting my JSP web app on servlets.net and experiencing an extended outage with no support. The difference in support was nothing short of miraculous.
I’m inclined to think Apollo failed to understand the investments necessary to make such a business work, and figured they could squeeze costs out of the business without losing value. Funny how these finance types always seem to find themselves suffering from “Black Swan” events every few years.