

Last year Unity merged with ironSource - a “mobile monetization and distribution” company that was once blacklisted by Microsoft for developing and distributing actual malware. I’d assume the tracking is done via a product brought over from that side of the business.
Some math functions have slightly different results depending on architecture and OS, so they fuzz the results a little. Here’s a tor issue discussing the problem: https://gitlab.torproject.org/legacy/trac/-/issues/13018