Yeah the price spike is huge on Poloniex, but it's unusable haha, you can't deposit or withdrawal.

Which is probably the reason for the erratic price action, speculators gone wild. I first saw it on coinmarketcap and thought "holy crap I need to sell some SBD". But then I went to the Steemit internal market and was like "hmm, no exciting prices here." I think Polo single handedly skewed coinmarketcap's average.