Why are you asking third parties to conduct this research?
Why isn’t this an initiative driven by an internal team? Where applications for this program advertised outside of Facebook?
Is $2M realistic for this research? I know I wouldn’t be enthused considering my total compensation. Do you expect top quality researchers to apply?
The platform is constantly evolving. At any point millions of individuals could be part of an A/B test that alters their experience. How can a third party navigate these conditions without corrupting their findings?