Free Covid tests website

https://special.usps.com/testkits

The Privacy statement seems very bizarre to me. They mention law enforcement, labor unions, financial transactions (tests are free)??

Privacy Act Statement

Your information will be used to provide COVID-19 Testing Kits to the address you provided, and to provide company and product fulfillment information about that testing kit to a federal executive agency. Collection is authorized by 39 U.S.C. 401, 403, 404, and 411. Supplying your information is voluntary, but if not provided, we may not be able to fulfill your request for a COVID-19 Testing Kit. We do not disclose your information to third parties without your consent, except to act on your behalf or request, or as legally required. This includes the following limited circumstances: to a congressional office on your behalf; to agencies and entities to facilitate or resolve financial transactions; to a U.S. Postal Service auditor; for law enforcement purposes, to labor organizations as required by applicable law; incident to legal proceedings involving the Postal Service; to government agencies in connection with decisions as necessary; to agents or contractors when necessary to fulfill a business function or provide products and services to customers; for customer service purposes; and to other federal executive agencies pursuant to 39 U.S.C § 411. For more information regarding our privacy policies visit www.usps.com/privacypolicy.

Can someone explain why the USPS is the lead agency on this? Seems odd unless it's a trap. The wording in the Privacy statement makes it seem even moreso.