They made an announcement today, which says:
Please note our new general rule #3: pinnacle Sports reserves the right to refuse, reject or suspend without prior notification any customer who is suspected of cheating, hacking, attacking, manipulating or damaging our normal betting operations (including the Internet Betting Service). Any bets made with the intention to cheat, hack, attack, manipulate or damage our betting operations will be void without prior notification at the discretion of Pinnacle Sports.
Hope this is not prelude to future limits/closing of winning accounts.