Not me. I've entered a few in my day, and friends and family have done the same. Of course, no one has ever won anything...or been contacted.
I've always figured they're just advertising/marketing gimmicks for whatever product, service, or whatever is being offered...with no intention of having anyone actually win ANYTHING.
So...have you or anyone you know actually won any sweepstakes before? I'm mainly talking about the kind you'd find on television or in magazines, etc. Not local newspaper or raffles from your church, etc.