Please re-read the article. If you purchase X11, the coins will be mined in DASH and then using something like 'shapeshift.io', they will be converted to Monero for you.

Genesis, does not mine Monero.

20 MH/s will cost you about ~$150 which at ~$5 / month gain (assuming coins keep their value), you will be unlikely to make your money back. That gain will go down over time as difficulty increases so even if coin value increases you still might lose money. You would have been better off just to buy the coins directly and hold.