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How can I provide you a good quality traffic without having those stats?

I am classifying publishers based on those stats and also requesting money from you again based on those stats.

You can not differentiate by saying not, because there is no such an option like NO!

I define good quality traffic by what they are doing on my website, not by who they are or what they are doing before they end up here.

Sounds like you are a direct response advertiser (as am I). For brand advertisers, ad engagement is a huge part of their measurement. Likewise, for direct response advertisers growing awareness through display and video, these ad engagement signals are critical for optimizing. On-site performance is just one measure, but when you start going down the whole view-through attribution rabbit hole, you'll want to look at engagement metrics like these to provide additional signals to steer you in the right direction.

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