"An Ohio farmer, Roscoe Filburn, was growing wheat to feed animals on his own farm. The US government had established limits on wheat production, based on the acreage owned by a farmer, to stabilize wheat prices and supplies. Filburn grew more than was permitted and so was ordered to pay a penalty. In response, he said that because his wheat was not sold, it could not be regulated as commerce, let alone 'interstate" commerce'..."
Roscoe lost.
It did not, illustrated by among others, US v. Lopez.
A company commercially gathering data that is not exclusively limited to data on in-state activities of in-state residents from (transitively) exclusively in-state sources, and selling it, is engaging in interstate commerce.
that could make some of 'the goods' illegal.
and no I don't think t-mobile's recent email about privacy changes should count as opted in - I know the other users of the plans did not even get such an email also.
[0] https://www.fema.gov/fact-sheet/allocation-rule-personal-pro...