When we asked for a modification of lucky stars wheel was exactly to prevent this from happening, but Oasis instead of hearing to us (and so placing there 5/10 frags of ninja we could complete in other ways in common weekly events with a chance to appear 8/16 times higher than the 80 frags in a row) placed there madara founder (a ninja that was not possible to piece in any event but that one) with no increased chance to appear at all (the chance to get his 10 frags was exactly the same as getting the 80 frags of minato now).

seriously, remove the 80 frags and place there 10 frags with a chance to drop 8 times higher than the current 80 frags.

is not that difficult to understand, no?

here is not china, the average western world casher indeed likes gambling but only if is limited and often gives rewards, even if small.