MGM offers $5 mil to invite a friend to download the game. It says that you will receive your coins after the install. I didn't get my coins and wrote support and they told me (even though it is not stated on their app) that it would be loaded on after 48 hours!!! Frustrated, I waited my 48 hours and still don't have the coins they advertise AND they won't respond to my question as to why I haven't received them. It's a great game but I am deleting it from my phone out of principal of it all.