Google, Apple and Microsoft have been working on technology to track user behavior for decades. COVID19 is simply a convenient excuse to take the technology live.
The COVID19 epidemic has reached a critical mass and contact tracing no longer does anything.
However, this technology would be a great way to track all of the users who attended the protests.
Quite frankly, they can track people who didn't attend the protest.
Google knows if you went to the Democratic Rally, the Republican Rally or, God forbid, a Libertarian rally.
They already track people when they go to restaurants or to a salon for a hair cut.
They can track people to see where they go for job interviews. It is such exciting tech.
With all that information in hand, Google will soon be able to coerce people to go where the tech giant wills.