They really should provide you with a token after each attempt
open a crate, get a token
get 30 tokens, you get 1 ticket
That way if you are unlucky enough to get 30 misses, you still are rewarded.
And if you end up with 15 tries with a ticket, you still have 15 tokens left over! And you might even be tempted to spend for 15 more crates!
[Currently Inactive, Playing BF4]
Magic find works. http://sinasdf.imgur.com/