From Criminal Legal News: 
Since this data is anonymized and commercially available, government lawyers have argued that Carpenter doesn’t apply…. “In this case, the government is a commercial purchaser like anybody else. Carpenter is not relevant,” according to Paul Rosenzweig, a former OHS official and now resident senior fellow at the conservative and libertarian think tank, the R Street Institute.
- “Criminal Legal News:”: https://www.criminallegalnews.org/news/2020/jun/15/office-homeland-security-circumventing-warrant-requirement-buying-cellphone-location-data-marketing-firm/