Pic source: https://www.vice.com/en_us/article/qjdkq7/avast-antivirus-sells-user-browsing-data-investigation
An infographic showing the supply chain of browsing data from Avast through to Jumpshot's clients
Avast destroyed AVG and Piriform. Ccleaner use to be one of favorite tools, but not until Avast acquired Piriform and start spying on its users.