I never listened to mike and mike but espn in general is floundering and keeps laying people off. I was much more interested in when they shut down bill simmons and his first website. I'm assuming mike and mike had just run its course and got caught up in that espn fray.
Skip bayless left a while ago, kind of old news, but he basically went on rants and espn got tired of him. While I don't really value skip's opinion or his style, he's definitely not a shill for sports like the way espn always backs the nfl and goddell (some of the stuff that got simmons fired), and I think he just go tired of it. If you want to do real sports reporting or unfiltered commentary ie say negative stuff about athletes and leagues, espn isn't really your platform. They protect their relationships too much.