Do these profiles clear their cookies after request? I assume if the service finds a matching cookie, it will prefer it, or at least use as an extra identifier.
Technically one can create this and launch a new profile everytime. It can still detect the device (there are some failures - if I change the screen resolution/dpi). May be after 3 or 4 times, the server may also detect that a certain ip address is trying the same thing.
But how could it distinguish different profile directories, if they use the same settings. I would assume profile id, directories, or others should not be exposed through the browser. I am not used to chromium-browser (is this chrome? forgive my incompetence), but I wonder what kind of profile-specific static identifiers despite cookies could leak out the browser?