The important thought experiment is as follows:
Original Riftwatcher pre sale buyers were able to pick up these packs with an SPS valuation (at the time of the presale) of about 8 cents (some a bit higher). At that cost at the time of the presale original buyers were able to get their packs (plus promo bonuses, plus quantity bonuses) initially for roughly 62.5 SPS/pack.
... With this proposal of 100 SPS tokens plus 1 voucher per pack that is about a 62% premium of nominal SPS paid per pack, so the original buyers are not being undercut nominally in SPS.

But the most important facts that need to be understood in this proposal would involve the volume of SPS that could possibly be added to the DAO by players that are happy to spend their hard-earned liquid SPS. For hypothetical reasons if this proposal passes, and 1,900,000 packs are sold in the two-week period, that is 190 million SPS placed in the DAO treasury. The current total supply issued is 1,094,382,755--that's roughly 17.36% of all issued SPS at the moment being absorbed by the DAO. That is a massive amount of the total float of SPS as well as the available SPS not staked by stalwarts in game.

At the moment of this proposal there are 1,958,712 total Riftwatcher packs available for purchase. This number will of course decrease due to players purchasing these packs and the game burning packs day to day.