In the metal world, this is often called "selling out." Just look at Metallica. They haven't produced anything good in 24 years that wasn't ruined by clipping.
Machine Head did this when the band fired Logan Mader and were subsequently kidnapped by this evil alien named Ahrue Luster. Luster held the remaining member's families at gunpoint to force them to collaborate with him to make a couple of stupid nu-metal albums (they were originally groove/thrash metal), which they did. Then they broke free when Ahrue put the gun down for a second and the band, along with new recruit Phil Demmell, subsequently told Ahrue to go ♥♥♥♥ himself with Through The Ashes Of Empires and The Blackening (where they returned to their old style).
The only band I know of that achieved the opposite of this was Pantera. They were originally a hair rock band, so already they were sell-outs. Then they hired Phil Anselmo, changed their style to Groove Metal, and proceeded to dominate all things that rock.
Also, My Chemical Romance was never punk and I hate you.