Sorry, I know it's slightly off topic - but to be fair this does involve Ccleaner since their current installer installs avast. This data collection issue avast has therefore directly impacts CCleaners users - since not all are given the choice of whether they want avast or not.
Essentially the Ccleaner installer has an x% chance of silently installing an application that can honestly be considered spyware, without the users consent. There is no angle that this can be looked at for it to be considered acceptable.
With piriform being owned by avast, I doubt there's any chance of getting it removed from the installer - therefore the only way to fix this issue for Ccleaner users is to fix the installer, and make the choice 100% up to the user. A default option change to a no would solve this, but since that hasn't been done I'd imagine there's pressure from avast involved.
This, I'll believe when I see it. "changes are coming" loses meaning when it's repeated over a period of 2 years with no fixes. Lets be honest - this is clearly a very low priority issue for piriform - and benefits avast, their owner. This looks shady no matter how you look at it, and it's getting hard to believe they want to fix it at this point.