ad arbatrige

Sorry if this is not on the correct category but I'm looking for an invalid traffic filter for ad arbitrage. I'm willing to pay a monthly fee. Advice is appreciated

I saved up $3k for building websites and I spent half on a seo website and I plan to use the other half for a quiz website. For the quiz site I want to focus my efforts entirely on paid traffic. I found some good traffic sources for ad arbitrage but the thing I'm stumped on is monetization. I...