On the screen that invites us to take part in a study, there should be a link to the study details. In the email I got for the currently posted study, there was a link for more information. Part of that included privacy concerns. This study may require participants to use some type of app or device that had access to your phone, including all text messages, all emails, and much more private information that people should be aware of.
Thank you for your feedback. I will share it with the relevant team