Earning $20 per day with CPA marketing is possible but not easy. You need to choose the right offers that convert well. You must target the right audience and drive quality traffic. You will need to test different ads and landing pages to find what works best. You should focus on offers with higher payouts for better results. You must be consistent and track your performance to improve your campaigns. Earning $20 per day is achievable if you dedicate time and effort. It will take patience and learning to master CPA marketing. You can start seeing results with persistence and testing.