Police spying is discoverable, to a point, in the U.S. by following the money disclosed in public records and targeted employment of FOIA requests.

You might be able to glean sources like court records for evidence of things like corporate data sources used at trial, or perhaps other secondary sources. Finding and compiling that data is much less straightforward than that which is manadated, at least in theory, to be in the public record.

The EFF has always been aimed at the government anyway, and its taken decades of pressure to reveal what it does. A different organisation is probably necessary to dedicate itself to corporate overreach.