You old cynic, you 
It may be cynical, but many have stopped using CCleaner completely. It has also possibly stopped some ever using Avast again, e.g. those who got avast installed after updating CCleaner some time ago.
Oh I know - I was one, at one point.
But I only use the portable version and prevent if from phoning home by blocking it in Avast firewall
I only use it for checking my system restore points and an occasional registry check, both of which it does well.
I
never use it as a cleaner; I replaced all that functionality with a batch script
