neowin[.]net/news/amazon-luna-to-now-run-fortnite-also-accessible-on-a-free-7-day-trial-for-non-prime-members/
theverge[.]com/2023/5/3/23708954/amazon-luna-fortnite-cloud-gaming-prime
Luna is Amazon's cloud gaming platform -- the game runs in the cloud so you can play it using your phone, tablet, Fire TV device etc. It generally requires either one of their Luna game controllers or their controller app running on your phone or tablet, which takes the place of the game controller. Xbox cloud gaming requires an Xbox gaming pass, while Nvidia's GeForce Now limits how long you can play, so Luna may be a preferred option for those people with Amazon Prime -- otherwise Luna+ costs ~$10/mo.