Did you even read beyond the OP's title? He's not suggesting any claiming/camping stuff like there was before.
He's just saying that there should be more rewards for boss monster FATEs. And I agree, there really needs to be something more exciting after you find a huge boss mob and take it down. If not rewards for every single boss, then at least a boss-hunting achievement track.
And if they never introduce more rare/cool items into the game because it's a "reason for RMT to exist," that's just tragic. Making the game economy more boring to discourage bannable activity? That's letting the terrorists win, if you'll forgive the phrase.
Have you farmed FATEs/done FATE lvling parties, by any chance? If so, I can see why you'd get bored of them. But I only do them if they happen to pop up near where I've been exploring, and they haven't gotten boring for me yet. Yeah, I level a lot slower than most people, but I seem to be having more fun than everyone that complains so much about FATEs.
One of my favorite experiences so far in ARR was stumbling upon the Lazy For You lvl20-ish boss Ochu FATE. It was actually challenging and had some interesting boss mechanics with adds, AOEs, all that. The Baby Bun minion I got after narrowly escaping death several times was a great reward.
Anyway, I definitely agree that there should be more rewards or SOMETHING to make those boss FATES feel as exciting as a boss battle should feel. I wouldn't mind a little RNG like the OP suggested, with only 1 person out of all those who got a gold getting the item. Or something like that. Everything below 50 (and even some endgame stuff) is way too common and easy to get in this game. I need exciting things to spend my gil on. I also need the small chance to loot something actually valuable once in a while!