The lowest filled sell order was 0.079 BTC, which was nearly 4x the price they were bought at, so somebody made some nice profit. Hopefully, the process will be a bit more clear now.
We wanted the post buy-back price in the market to be the new market price, but since the market was so illiquid at the time of the buy-back, this doesn't really make sense, so instead we are increasing our new METAFEES prices by 1%, which roughly reflects the profits / total BTC inventory ratio.
For the next buy back, we expect the market to be more liquid such that the post buy back price will be the new sale price.