I always figured it was an attempt to get you into the habit of opening their emails so you would continue to open them after the sweeps was over, but maybe I'm overly cynical. Whatever, it is a pain.
Also, I don't like having to leave ST to enter my e-mail to fetch a free code, copy it, and then come back to the entry form, when I know they could just make one pop up by clicking a link directly on their entry form. Still, that's better than having to mail away for a code so I try not to be too bugged.
Best 10/2009 win: 47inch LCD 1080p HDTV including a TV stand, Nintendo Wii and two games (1 of 10 Grand Prizes)
Best 11/2009 win: Kindle (1 of 7 Grand Prizes)
Best 12/2009 win: $5 Home Depot gift card (1 of 10,500 fourth prizes)
Best 1/2010 wins: Loacker bag with 8 mugs (1 of 1000)--from my very first sweeping entry in the New Year!
................................. Philips Prestigo Universal Remote Control (1 of 5 remotes out of 50 second place prizes)
................................. $5 check from Cheerios (now a total of 4 out of 40,608) actual money--woo!
Best 2/2010 win: stainless steel tongs, $2.66