Never heard of them

Have you asked on the forum for eBay US, where you are registered?

You only need to have a look about the thousands of warnings on this forum for eBay Australia alone about various scams

Every other day though people ask 'why were they scammed'

Here, we even have recorded messages about gift card scams that play over and over in the supermarket

Again, people still ask why were they scammed

Thousands of scammers on recorded phone calls, with the 'press one' scam

People still go right on ahead and press one 'to see what happens' 

People commenting 'nobody would try to scam me'

It simply makes no difference how many times you warn some people, it will fall on deaf ears