I've been using Ebay for over a dozen years now. As of about 2 weeks ago I notice that there are now pop-ups that actually show how many folks have a particular item in their cart!
It used to be just how many would have the same item in their watchlist, but NOT in their cart!
I ordered 3 items from Ebay about 7-10 days ago...
1 - had 9 folks having that item in their cart
1 - had 6
1 - had 2
Lots of folks fence sitting, so I relieved them all from having to make a decision...LOL