For my use case, I would like to limit and randomise 'winners'. That is, someone reaches a score but may or may not actually win a coupon - PlayZo picks at random and/or based on "1 in every X wins". Important for me is needing to limit winning coupons to (for example) 10x 10% off, 5x 20% off, 1x winner of 100% off coupon. I may also prefer the 1x 100% off to occur between specific dates (ie. closer to an event date to build interest in continuing to engage). Is any of this possible with PlayZo?