Answering these questions will help you better design your product. Every single element is important.
What do users really want? What pain is your product relieving?
What brings users to your service?
What is the simplest action users take in anticipation of reward, and how can you simplify your product to make this action easier?
Are users fulfilled by the reward yet left wanting more?
What “bit of work” do users invest in your product? Does it load the next trigger and store value to improve the product with use?