Yes, according to the Avast privacy policy the data is "anonymized or pseudonymized." As I already speculated in https://palant.de/2019/10/28/avast-online-security-and-avast..., they likely went for pseudonymization in this particular case - meaning that they simply left the data as it is. The unique user ID being sent there is technically a pseudonym, meaning that it isn't directly tied to your identity. That this "clickstream data" is easily deanonymized - so far there is no indication that Avast cared.