Review: YouGov
Easy to passively acquire points for a significant amount of money, but replacing my e-mail address was difficult.
As I originally posted at trustpilot.com/reviews/6995b8b5893fa4075530214c, when prompted to:
I can’t modify my e-mail address via my account preference page, and the application is not FOSS.
However, the daily questions are generally about things that matter, and connecting my bank accounts allowed me to easily gain points that I otherwise would not have, which gained by a 50 GBP AMZN voucher in approximately one or two years.