Well...depends...some clans don't die..they become official..legends....while some have rich and sloppy/lazy owners, and they die a few months after their birth. And, don't sweat about the waste of TC thing. It's not yours, it's their's XD. Maybe they don't care bout the clan, maybe he just wants to waste the TC for fun :P
And also, I agree what danny said, it's for social reasons, hey, some clans even pick clan wars with others to have fun ^ ^