People have asked that a screenshot of Threads "How do we use this information section" be included to show that it is not simply to provide the services, and includes ad targeting.
Edit: Note it has been discovered that Threads apparently has a different version of this document if you fetch it from the EU, which differentiates between third party users with and without a profile that addresses this concern. See reply below for details: https://mastodon.online/@mastodonmigration/111587323824968255