Media Rewards App

I got invited to a survey last night that if I recall correctly you install a App and keep it installed for (can't remember how long - 3 months I think) & you get 600SB's for it.

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Did anyone else get invited to this one? If so how long did you have to keep it for and what do you do other than keep it running in the background? I can't seem to find the information about it anymore.