what exactly does this mean????
Separately Betfair may levy a premium charge on your account should the amount of commission (together with any other Fees described in these Terms and Conditions) generated in respect of your account be less than a specified percentage of profits you have made over a given period of time. Again we will use reasonable endeavours to inform you if your activity incurs a premium charge.
other than 'if you're making a lot of money we reserve the right to taker a chunk of it'
???

