Now I have absolutely NO idea why this card has been banned from play. Sure it's effect that lets you draw a card every time your opponent special summons is powerful to the point where it should be limited, but why banned?
Second, it can help people turn a duel around, but as I said a SPYRAL player I once beat with it, "You chose to special your monsters, even at the cost of letting me draw cards. The fact that you lost is your own fault. If you hadn't chosen to special summon, you would've been able to win."
So in other words, it doesn't force your opponent to special summon, it forces them to RECONSIDER special summoning. Now obviously it can stop mass summonings, but THAT'S THE POINT. It's the best way to keep OP decks like Pendulum Magicians in check. It's supposed to help give each player a chance to win.
So with that being the case, why on earth does Maxx "C" need to be banned rather than limited?