It seems to be constantly sending GET requests to a tracking pixel with data passed through a query in the URL; it seems to be either tracking or profiling (maybe even mining?). After some googling, this may be part of Ezoic [1], a forward proxy tracker.
Since it is a locally-hosted script, it would be hard to block by domain name alone.
Would this classify as a Dark Pattern?
[0]: https://plantuml.com/login/ [1]: https://datacadamia.com/marketing/analytics/ezoic