What are the risks of Facebook research APPLAUSE program ?

Wondering what are the risks involved in Facebook Applause app? Check out the following inputs from our experts.

Are there any risks of using Facebook research APPLAUSE program. They are paying $5 per month to people who install the app in their mobile. But are there any risks of installing the app on mobile ?

I mean will they be tracking all data of the users and then sell it to marketing companies ?