Seriously, Gumroad makes it so easy to sell any digital product.. as they make checkout so easy for customers. Product is delivered instantly after purchasing

Its popular, Its User Interface is good. It's easy to use.

It's ridiculously easy to set up in minutes. In your account, you click on "New Product" and follow along. Gumroad delivers digital products like pdfs or audios straight for download or directs them to your membership/course site right to your customer's inbox. Just connect your payment gateways and you're off! Embedding the products into your website is also very easy, loads well and the customer UI and experience is a smooth, seamless process that beats other platforms. Best for small casual solopreneurs/freelancers/hobbyists that sell low-volume digital products, like 30 sales of a $20 product. Also for those who don't exactly like marketing their goods, as Gumroad allows your product to be displayed in their marketplace called Gumroad Discover.