I'm curious how this load balance works. Would network client A be assigned to WAN1 while network client B is assigned to WAN2? Or would destination site 'C' be assigned to WAN1 while destination site 'D' is assigned to WAN2 regardless of local network client? Or, would there be finer granularity, perhaps flipping WAN ports on every request or a scheme based on latency?

I can imagine that rapidly flipping WAN ports would frustrate secure applications, such as accessing one's bank account. How does this work with a DMZ that is required for a video game?