No, you're wrong. Firstly, as usual for the USA,
you assume the entire world
is American. Hint: it's not. People in other countries may not be readily able
to search eBay US. Or they may not have saved searches, or they may not
cover what's posted, or they didn't know something existed or was available,
or a thousand other reasons.
If you don't like them, ignore the threads.
Some of us find them useful or interesting.
I agree. The volume of these eBay emails is not high. It would be another matter if there
were really a lot of these emails, but as it is I find them useful/interesting.
Regards
Rob