Designers want human activity data from representative sets of (potential) end-users to generate reliable insights. Data subject shape and characterise their data, which has ethical implication. Offering them a comprehensive control over their data creates fears of data shortage and undistributed data sets. Recruiter is an application that helps designers disseminate their call for data along purpose, implications and rewards. Donors are only prompted by calls that matches their profiles, so they can step in or decline.