There are no "spots."
Every so many crates a player will win a gun. You've just pumped hundreds of thousands of ZP into your account. I'm shocked you don't have more
Now, if someone could figure out the basic times (record the server message times of winning the gun, and see about how long it takes for the counter to reset), then you'd have something useful (e.g. more likely to win if you spin between now and now than any other time).