I own an Amazon Marketing & Sales Agency and it is going well, but I am currently building out a product to help Amazon Sellers/Vendors automate a bunch of their tasks.
Selling on Amazon requires a pretty gnarly amount of work/experience to get things done. Knowing their grammar and processes can take weeks to read through, then another year to really understand.
Amazon aside, understanding the retail business is a separate beast. Which is why we are kinda special. We are retail sales agents with software experience and analytical mindsets.