Recently we added a feature called
Anonymise User ID which is actually only
Pseudo-anonymise User ID the user id by doing a SHA1 + Salt. So we should rename the feature to "Pseudo-anonymise" to not be misleading.
Note: the IP Address is properly anonymised (since we remove information and truncate the last bytes). Similarly the Ecommerce Order ID is also properly anonymised since there is random number in the value being hashed.
Some detailed background on Pseudoanonymising (actually: pseudonymization) here: https://iapp.org/news/a/looking-to-comply-with-gdpr-heres-a-primer-on-anonymization-and-pseudonymization/