i have tested this a long time and the option is spend ten gold or kabans is bugged , yes in fact it makes the chances near zero and you get hardly nothing or nothing at all 95% of the time is the average !!!! thats terrable and a rip off ,its allready bad enough they wont give any thing in the market to help chances improve ,nor do we get a improvement for the three memberships !!! just not good ,period. the things could and should be added !!!! well , sigh ,lets hope they fix this bug at least ,but i doubt it ,with there past record and poor attitude !