I think the insights on the multipool's effects on the market are a bit flawed. As far as the miners go, they're getting a constant stream of BC that they will in turn sell back into the market. Sure, the pool is buying to supply the miners, but the net could easily be no market movement at all assuming the miners dump their coins back (they almost always do).
But it is an interesting experiment.
There is no point miners mining at BC Multipool if they are going to sell their BC for BTC. They may as well just mine at Wafflepool or Multipool.us! I am certain that all miners at BC Multipool are mining there SOLELY to increase their own BlackCoin holding. Certain of it!