This seems pretty different. This is a _cross channel correlated ID_. In other words, this is able to (and presumably used for) tying the user record together between multiple, separate applications. This isn't a "generated ID that only identifies you within the current application vertical". Those IDs would not be able to cross-correlate between other app properties if leaked. The IDs as described in the article would be able to be used to build out a more rich "permanent record" on the given user as more information flows in from various apps.