There's no reason that the receipt/transaction wouldn't also be reported to the agency. Just because it can't be linked to any specific individual, doesn't mean

There's no reason that the receipt/transaction wouldn't also be reported to the agency. Just because it can't be linked to any specific individual, doesn't mean the data is entirely useless for the kind of analyses they are looking to make. ...or, for the kind of analyses they say they are looking to make.