Of course investors count. But customers always come first. I don't believe I am. Marketing is virtually worthless unless it is well financed, and those finances are astutely used. This is an interesting scenario, but highly unlikely.
Markets also have a long history and memory as well, especially from a large commercial aspect.
This may have once been true, but it isn't any more. This depends on how well new entries in different segments of the market provide service. Until recently the didn't have much of a choice, and to some extent they really still don't in the DN arena. And one of those values is consumer loyalty - or brand loyalty. It's simple marketing.