Google now gives verifyably false information. So thats cool.
Searched today for "Dynmap default port". Gemini gave me Minecrafts default port (25565), and then made up another port (25566). The actual port, as per the first real link, was 8123.
You can have an offline gitlab/forgejo and a public github. I do most of my work against a local gitlab, and mirror up to github for anything that needs to be shared.
I have a couple of projects mirrored down to my gitlab as a backup, and they are not online, so can't realistically be DCMAd.
I got the exact same impression. Reminds me of the XYZ evangelists who only know XYZ, think it applies to every situation, and have little other experience.
I think you need to factor in lube costs, and once you do, it stops making financial sense.