I find this odd also.
When someone is selling thousands of copies to hundreds of individuals, usually the person communicating is not the person who is packing, and if they are, god help them, as there will be no way they are going to get them out in a timely fashion and pay attention to anything anyone has emailed them anyway.
It is most effectively done in assembly line fashion and you are just going to get the books on the top of the stack when your packing slip/label is next. Thus, even more reason for Larry to cull anyone with what he feels are overly high expectations.
Someone posted that Larry posted this:
"I'll screen gorgeous copies for you!"
"I'll screen my copies for the best for you guys."
Perhaps he was setting unrealistic expectations.