Very good idea to ignore the things

Have you already got your pop up blocker on and an ad blocker in place?

Many people have reported getting swamped with spam after 'entering'  and nobody has ever once heard of anyone winning 

Ebay don't seem to care, in fact some of these types of things are even 'supported' by ebay (there is one to win $5000

Again, no sign or mention of there ever being a winning