I've just requested that CoinMarketcap remove the market from the KOBO page. I'll see what they say.
Coinmarketcap worked quick, Yobit price is no longer included in the market average, and because they were always heavily weighted downwards, kobocoin has increased by 87% in 1 day, lol.

What is the reason that Yobit prices were removed from the average coin price calculation? Because of low volume on their exchange?