You can promote as many products as you want on ClickBank. There is no limit to the number of products you can choose. ClickBank has a wide range of products across different niches. You can select products that match your audience. You can also create multiple campaigns for different products. The more products you promote, the more chances you have to earn commissions. It is important to pick quality products. Always focus on products that provide real value. This way you build trust with your audience and increase your chances of success.