> If two companies with 100% different spam & abuse systems detected something wrong with this ads Do we know this for sure, or are we assuming they only use i

> If two companies with 100% different spam & abuse systems detected something wrong with this ads Do we know this for sure, or are we assuming they only use in-house resources to determine "suspiciousness"? Could they both be contracting out to the same third-party for some additional trustworthiness signal?