There's no point trying to lower ctr, you'll be banned. You don't get caught because of ctr, that's a myth.
You might get away with a few leads here and there, but if they're all shit, or the majority are, then with the thousands of leads they get across hundreds and thousands of affiliates, their metrics will show, no matter how much you dilute, that your leads are trash and you're defrauding them. Fact.