This is because AdWords Express has been replaced by Google's modern automated campaign types, which are not compatible with third-party fraud detection tools due to platform limitations imposed by Google.
AdWords Express became Smart Campaigns: The original, simplified AdWords Express platform was first integrated into the main Google Ads interface and renamed Smart Campaigns.
Smart Campaigns became Performance Max: Today, most Smart Campaigns have been upgraded by Google to Performance Max (PMax) campaigns, which are Google's newest and most automated campaign type.
They intentionally restrict the controls that tools like ClickSambo need to operate:
No Tracking Templates: They do not allow the use of custom tracking templates, which are essential for sending us real-time data for every ad click.
No IP Exclusions: They do not support direct IP address exclusions, which is the primary method used to automatically block fraudulent sources.
These campaign types provide the necessary control to fully integrate with ClickSambo's advanced tracking and automated blocking features, ensuring your ad spend is properly protected.