Don’t we already have a 0-100 Test Score for nodes: the upload/download %-success numbers from @BrightSilence script?
If you’re winning 95%+ of races your setup is fine. If you’re winning 5% of them your setup is not fine 
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The Satellites don’t have to do anything special: you either win races with normal traffic (and get paid normally)… or you lose them and make less. SNOs see the impact in they wallets, and can decide if they’re happy with their earning rate… or if they need to try to tune performance for more coins.