Wow, 500 packs is a nice bit! As for me, I'm thinking just 50 packs, for which I'll need to have 5K SPS accordingly. My currently held 1K SPS is worth $350 USD, so I should still buy another $1,400 USD in order to get those 50 vouchers for the packs I'll still have to pay for with SPS. Putting it this way, the offer of "free cards" stops feeling attractive any longer, even despite the certainty that it will be worth it in the end.