I myself have dropped at least $100 on League of Legends. I was spending my money foolishly though because I usually spent the money on skins instead of champions.
I purchased two DLCs for F2P MMO DC Universe Online, and may yet purchase others - in the cases of the DLC I purchased, they fit the character storyline.
Sony Online Entertainment (the publisher - and yes; the SAME Sony of PSx "fame") did a splendid job of pitching the game as a player's opportunity to put themselves in a variant of the DC Comics Universe they grew up with - I basically took that handoff and ran with it. Both DLCs I bought fit the pattern; "Lightning Strikes" is because I am an unabashed fan of the Flash. I have nothing against Superman, or Batman, or even the various Green Lanterns - however, the Scarlet Speedster - specifically, Barry Allen - is my favorite DC character. The other DLC, "Battle for Earth" is because I hate, loathe, and outright DESPISE Brainiac. More than Lex Luthor. More than the Joker. More than ANY of the Central City Rogues. Therefore, why would i pass up the signal opportunity to dismantle, disassemble, and outright decimate not only his army of cyberminions, but Brainiac himself? Every character I have created (six heroes and the one villain) shares my grudge against the Ultimate Cyber-Terrorist - it's not professional, or business, with any of them. It's war - and it's downright personal.
(Remember, where is the FIRST place you start after you finish creating your character in the game - whether on PS3, PS4, or PC? On a Brainiac capture vessel. That means that Brainy pulled you out of your nice life and put you in a CAGE. Yes - you have new powers and abilities; however, that ALSO means your ability of going back to your old life - whatever it was - is none. Oracle (Justice League POC) or Calculator (Society POC) is giving you opportunity to collect some payback - why wouldn't you? That's the pitch.)