Selling digital goods that don't require continuous maintenance or services, if you can make it work.

Things like Tailwind CSS, game assets, courses, books etc. The caveat is that it's not easy to produce something great, but if you're good at what you do and if you have built a large followerbase on social media it can work I think. Like games, movies, music etc. it's a hit-driven business though, so Paretos' law applies to it (90 % of overall revenue will be generated by 10 % of the products).