Apart from having traders forced to trade their own systems via C2 there are some other possibilities to give potential subscribers better insight into trading systems they are thinking of subscribing to.
One idea is to provide a historical graph of margin requirement underneath the equity curve. This provides an indication of risk.
Another idea is to provide a historical graph of maximum single position (or margin) as a percent of trading equity. This again gives the viewer an indication of risk - if one stock/future is being held and occupies all of the trader’s equity then you know there is a potential problem. Likewise you can determine if averaging down is being employed.
For me these are more important than whether the trader is employing C2 to trade their system. For one, not all system providers use the brokerages supported by C2.