I just don't get why it should matter if someone comes in with a higher bid 3 days or 3 seconds before close.
So why do you reckon that sniping is based around putting a bid in the last 3 seconds?
Many people are against sniping, but it really does not make sense, even in an auction house the Auctioneer is giving you a fair warning and you can up until that last gavel hit to change your bid amount.
Really? As someone from the auction industry, I'd say sniping is completely opposite what happens in an auction house.
Auction house: Auctioneer stands with gavel raised and someone bids, he/she then looks to underbidder to respond before dropping the hammer and so on.
Sniping: Virtual auctioneer holds up gavel, bid comes in just as hammer is coming down - the end.
Just not a relevant analogy in my opinion.