Just won, at least they're finally giving some points away. Tried entering again and got this:
"Spalding: Sorry, u already sunk UR shot and won. Only 1 winner per sweepstakes. Txt STOP to end. Txt HELP for info. Msg&Data Rates May Apply."
1 winner per sweepstakes makes it sound like only 1 person can win per week, but I think it really means once you win that's it. SO... grab your wife/girlfriend/parent's phones and keep plugging away at those SHOT3s.