[_njyk]

Google doesn't want the leeches, they throttle the buyers who don't win enough, and Google was forced by the law to make lot of privacy improvements.

For example, before the GDPR you would receive the full IP address of the user and the visited webpage URL.

123.456.123.456 https://www.youtube.com/watch?v=vNvlZg_zh1s

Now you receive only:

123.456.123.0 and more limited information about the context

Though this better privacy has a cost, because it means less revenue for Google, but also less revenue for the publishers, and less relevant advertising.