What? I think we're talking about different processes and different time frames. The blues musician who just wants to be popular/mainstream isn't really what I'm going for, because they stop at step 2:
1. "Hipster" creates music that is anti-mainsteam, becomes popular for doing something different (and doing it well, at the right time/place, etc.)
2. Over years, mainstream music adopts unique thing hipster did. <- this is where you stop
3 New generation of hipsters create music that is anti-mainstream... <- this is what is relevant to this discussion
You can find examples of the above in any modern genre of music and I would argue is a part of a bigger pattern that happens to any sub/counter culture.