This protobuf spec is in no way relevant to the situation outlined in the anti-competitive behavior complaint. The protobuf spec is related to using the Author

This protobuf spec is in no way relevant to the situation outlined in the anti-competitive behavior complaint. The protobuf spec is related to using the Authorized Buyers RTB protocol within AdX. That's an ecosystem that lives entirely within Google itself, so there's no reason Google would want to disadvantage anyone since people using this are already essentially paying Google for the privilege. What the lawsuit is referring to is header-bidding, where an auction occurs client-side (or server-side using an O/O server endpoint) and the result is passed to GAM for competition via Dynamic Allocation. Google is being accused of trying to kill header bidding (because data is shared and profits are earned outside of Google's ecosystem), not their own RTB products.