One more scenario....
A rock band that wants to stick to it's roots and claims that a band shoud sound like a band..... just 4 guys playing their instrument, without any "overproduction".......
Then five years later they release an album with drum machines and sequenced keyboards and manufactured loops...... and, 25 layers of background vocals....
To me, that is also an example of selling out....
If they had never made that statement about being all roots and real, and just naturally progressed on there own, they wouldn't be sellouts.....