I believe EA gave permission for xwis.net to do this for Red Alert 2. You can sign up with a legitimate key and it works as normal as the protocol was reverse engineered and DNS taken over :)
This was probably straightforward for an old game like this but I can't imagine that reverse engineering the infrastructure required for modern games is feasible. I doubt games companies will have the cash or resources spare to consider this from the beginning nor years after.
This was probably straightforward for an old game like this but I can't imagine that reverse engineering the infrastructure required for modern games is feasible. I doubt games companies will have the cash or resources spare to consider this from the beginning nor years after.