We've beaten this to death many times. REI went mainstream, that is all. This is seen as a deviation from a climber-focus since the climbing subculture is decidedly not mainstream. REI has turned into Target, but, as others have said, REI was always a general mountaineering supplier. And they still are. However, they have surpassed that and shunted their climbing roots into the corner in lieu of Chukar Cherries and organic cotton walking shorts. It used to be (according to Jim Whittaker in his book) that the Board was made up of climbers; that changed somewhere down the line about the time Jim jumped ship.
It is what it is, but I choose not to support it.