I purchased 2015 packs in the Riftwatchers pre-sale, and opened them all. I still didn't get everything I needed to max everything, and I'd technically need to buy more packs to get everything maxed out, (in reference to future airdrops) even though, mathematically speaking, those 2015 packs were more than enough to max out everything in the collection.

Now, onto the claimed numbers for this proposal.

Possibly upwards of 190 million SPS to be stacked by the DAO,

There is no logical way in which that almost 43% of all liquid SPS will be used to purchase the remaining Riftwatcher packs from the market. With additional "Staking demand" coming onboard for SPS via Tower Defence, in addition to the recent requirements for battling.

While your proposal is highly optimistic, it is not realistic.

in no way slows down or stops the daily burning of 13,500 packs or the daily delivery of 1500 packs to the DAO

Why would the DAO (which wants to get as many funds as it possibly can) offer a discount on something that will be whittling down in supply on a daily basis? It makes no economic sense to the DAO, and it should not be allowed to be so financially irresponsible with DAO assets (unsold RW packs).

NOTE: All proceeds from the Special 2-Week Promotional Sale will go to the DAO Treasury.

ALL proceeds from all riftwatcher sales already go to the treasury.

I hope I have elaborated adequately on my remark of "no thanks"