Does this work in the blackmarket

So guys a few days ago my one clan mate in crossfire told me about how to win the main prize in crossfire I was wondering if anyone could verify that this works for them also.
So here's the trick you wait until you see the green writing and two people have won the same item then you buy ten crates and spin it to half my friend has won 2 ak camps this way and a andaconda adv. I've won a deagle-camo and a Thompson this way I hoped this helped but I don't think it's a gurantee win.
He described it to me like that once enough crates are bought someone will win it so if you buy at the right time you'll win it also