Prestige and crystal opening?

Today I've seen two people comment on how prestige ties into how successful we are when opening crystals. In our ally we have a SA hold week and a open week. On the last three open weeks I've gotten 2-3 4* champs from login, PHC and features crystals each week. I don't even know what my prestige is so does this mean I've just been lucky? How does prestige actually effect our chances with crystals? I can't get a T4CC to save my life from any map 5 crystals...
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So to put it plain and simple unless u work at kabam no one knows what affects crystals no one