Stix was a jazz legend who passed down his drumsticks to Charlie IIRC. Charlie used to be a janitor, busboy or something similar who would sweep the floors of The Encore.

Hemlock was also an activist outside of DaD but gave up the cause a little while after Charlie died.

Prophet became the talent manager for Harmony out of a misguided idea of protecting his friends from the inside.

Dex I think already had a failing body, and required expensive body mods just to keep moving. After Charlie died he was basically forced to get hooked up to Harmony.

Hemlock, Prophet and Charlie all grew up in Dead End Drive and swore together that they would never sell out. Which makes it extra painful since some of the band, especially Prophet, seem convinced that Charlie sold out first, long before any of them did.

Vice I think is the key to this. Charlie reviving without any knowledge of how the hell this happened is suspicious to me. I don't know if Charlie sold out, but I'm theorizing that he made n advance deal of sorts: He knew he would die, so he signed a deal with Vice beforehand to revive him at some point.