Alright, full disclosure time...I first took notice of the doubler thing and after I got my head wrapped around the rules, I decided since I hadn't spent for much of anything in a few months to invest ~$9.98 for 1,200cr., which was enough for 156 doublers...granted I'm still working on L card, but I'll be damned if I'm going to spend more just for free bouts all the time...basically sucks all the challenge out if people use a ton of both.
Of course there's always the people who argue that this is their biggest cash cow and therefore their only way to support and improve the game...guess my occasional buying of credits for event title matches never got to 2K/CD Games...