You need to sign up using the link. After that you will get a free case. You can get 3 more cases if you earn 1$ within 48 hours. The time starts when you sign up.
New users who registrates to Prime Opinion are able to get this bonus. After registration the code needs to be used within 24 hours in order to get the 10% bonus.
The 10% bonus is on 24 hours and then it expires.
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