Sometime who worked for an advertisement provider told me it worked well as a signal, though. This was before it was obsolete. So few people used it that it helped identify its users.
(His employer explicitly ignored it. They used an ML algorithm to assess signals, but they overrode that particular assessment as soon as they discovered it.)
(His employer explicitly ignored it. They used an ML algorithm to assess signals, but they overrode that particular assessment as soon as they discovered it.)