Again, I think that you're reading too much into it. At the end of the day, TLG is a business and one that is extremely profitable by all accounts. The fact that they chose not to discount exclusives in the U.S. almost certainly stems from the fact that they don't need to discount exclusives in the U.S. in order to sell them. In the U.S., SSD has sold out from almost every online market without any discounts. If TLG can sell out a $400 set without discounting it, why would they discount it? Conversely, TLG has sold out of Desert Skiff and the Malevolence in almost every market worldwide except the U.S. As a result, TLG has a need to discount those sets in order to clear out the inventory.
I think that the problem that many people here make when trying to figure out TLG's motives in any given situation is to analyze TLG's actions from their own perspective and ascribe to TLG motives consistent with the impact of TLG's decisions on them. Therefore, if TLG prohibits discounts on exclusives, people are apt to view such decision as being motivated by a desire to hurt "investors," when, in reality, it is almost certainly motivated by TLG's realization that it doesn't need to discount exclusives in order to drive sales.
Although TLG has an issue with the growth of the reseller market, it is simply implausible that every decision TLG makes vis-a-vis pricing and discounts is designed to screw resellers.