One of the most hilarious failed sellout attempts in metal was Celtic Frosts "Cold Lake". One of the most influential dark/death metal bands of the 80s suddenly doing 80s glam rock. Everyone was in shock. Right after that, they got their shit together again and made a couple of awesome records. It is only spoken of in hushed tones nowadays.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition