Mainly because all the software developed for P2P CDNs so far were so cumbersome unlike file-sharing counterparts. Redswoosh in my opinion was the least cumbers

Mainly because all the software developed for P2P CDNs so far were so cumbersome unlike file-sharing counterparts. Redswoosh in my opinion was the least cumbersome but having used it I never actually saw it use P2P, instead relying on its main server. Kontiki (used by BBC, Sky and Channel 4) was a joke too. It was difficult to remove; users couldn't control bandwidth easily and it forcibly started upon boot. When you removed it, it put itself back in the startup list again.