Agreed.
Plausible just makes false claims like:
> All the site measurement is carried out absolutely anonymously. Cookies are not used and no personal data is collected. There are no persistent identifiers.
That's a heavy statement and it is simply not true, as you quoted:
> an identifiable natural person is one who can be identified, directly or indirectly, in particular by reference to an identifier such as a name, an identification number, location data, an online identifier or to one or more factors specific to the physical, physiological, genetic, mental, economic, cultural or social identity of that natural person
hash(daily_salt + website_domain + ip_address + user_agent) will fall under this definition.
But again, you are right, better then anything any other service does
