Yeah it seems that the individual cards value aren't trading close to the value of the packs at the moment. So far I have opened a pack, even with one Epic summoner, it's still below the initial cost of 5 USD of SPS + 1 VOUCHER.
Whelp Herder seems like an interesting card, reminds me of Deeplurker, a Little League version. Haha.
if opening in bulk, they trade on average close to the cost, but opening individual packs, one pack might be far below.
Whelp is a little like that - though I haven't got it to work well yet!