http://kotaku.com/5827958/capcom-is-charging-for-a-3ds-demo
wtf capcom
Capcom is dumb.
It's Capcom. I'm not too surprised.
I'd love to blame Capcom for this, but sadly this is the fault of Nintendo still being a decade behind. At the moment, Nintendo doesn't allow third-parties to put free content on the eShop. Even if Capcom wants to make the demo free, they can't.
Capcom and Nintendo are both silly.