I'm convinced he's only in the thread for the sake of having an argument.
If that's true he's definitely the winner. No one I know who was confident that the Earth was a sphere would waste their time to argue with someone who coyly says it isn't. Not only that, he's hinted over and again that he merely affects or pretends flat Earth, like some dude sporting a pair of flashy, oversize sneakers, or clown shoes, to arouse outraged comment. He says, in effect, his motives are to poke a finger in the eye of stodgy establishment science - perhaps solely to enjoy his individualism, be provocatively different and maybe have some fun sending others into indignant dyspepsias. Kind of like the Pied Piper of Hamlin trying to lead the children of a village off deep into the woods. A fairy tale come true - for him!