Hmmm, that is my concern also. But come to think of it, at most if it don't work, just take it like losing a game of MJ lor. But if it works, then its like winning many game of MJ every mth.
At the same time, 4D also every week spend liao. So maybe instead of puttin on 4D, spend on this lor.
DISCLAIMER: Wait 4D strike cannot claim from me or curse me hor.