“at the moment with some of our companies we're seeing 60% visibility or so in Facebook in mattera versus what we see in our MMP so we actually look at that as our source of Truth are we seeing the results that we need to see in our MMP.”

Use Your MMP as the Source of Truth — Platform-Reported Numbers Can Be 60% of Reality

Meta may report only 60% of the conversions that your mobile measurement partner (Appsflyer, Adjust, Singular) actually records. Hannah's rule: never use platform-reported data as ground truth for scaling decisions. Use your MMP numbers to judge campaign success and to set scaling thresholds. The platforms have incentives to show favorable numbers; your MMP has no dog in that fight.