My biggest concern with SI was the confusion with billing, and having to re-think all of our campaigns, and which parent ASINS would go where, etc. I think ultimately, we would have been cheaper with SI.

Also, from an agency perspective, I didn’t want to have to signup every client w/ a separate SI account, and then merge into ours, etc. AdBrew was simple to onboard, and seemingly had the same ability to build out all of these layered, custom rules with a much easier to understand interface.