Oh, and I've found another mistake: At first, all players request Basic Discount, A Personalised Shopping Experience, and Half-Hearted Attempt At A Win. These have redeem costs of -1, 0 and 2, respectively. That means only total redeem costs of -1, 0, 1 or 2 are possible. And that in turn means "A Personalized Shopping Experience", the only way for players to request additional Rewards, can only be used to request Rewards with request cost < 1. Only "Basic Discount" qualifies for that, and it's already requested. Conclusion: There's no way to request additional Rewards and therefore no way to use all those fancy effects.
To fix this, I'd suggest changing the "less than" in the effect descriptions of "A Personalized Shopping Experience" and "An Instantly Gratifying Shopping Experience" to "less than or equal to". What do you think, ais253? (And of course, also the rest of you?) -- aranea
