Dog tag

I've only done it once. To be quite honest the Deagle Camo crate you get isn't nearly as good as the 500GP you get for completing each daily mission.

If you get GP black market crates you can get coupons, and with 60 coupons you can buy Deagle Camo permanently instead of having to gamble for it. Personally though I'd rather get AK Camo at 50 coupons and just use a regular Deagle.