Not sure if the IP itself gets banned (though I'm pretty sure it does), but definitely any accounts found to be related to your IP(s) will get banned if you fraud, so don't do it.
And even if you didn't get IP banned for a first offense, you would no doubt get it for the second offense. Cheating on ads isn't just a matter of a few cents (or dollars, over time) for you. It's a matter of money for the server, and ad credits for the players to get. If people cheat, nobody will want to sponsor us, and both the other players (who are innocent) and the GMs will lose out. Cheating on ad credits is not a light matter, and anyone who gets banned for it deserves it.