There are already existing campaigns in Seller Central or MWS. Will an optimization take place for them?
Yes, BidX is able to work with existing campaign structures of old campaigns. You can choose which keywords an automation or rule should be applied to.
For keyword-management, make sure that the campaigns have been assigned correctly in the "Structure" view of the Product Management. In general, the system will recognize which campaigns belong to which product and which match type was used.
Note: If your campaign structure is incomplete, you can complete it in a few steps via "Add missing ad groups".