How Not to Make a Sale (or a Friend)

This is a real exchange.  Sadly, I actually encounter this all the time.

Get a contact request at an odd time - in and of itself, not necessarily a bad thing, the internet is global - but a really ambiguous description that screams "I'm not going to tell you I'm in sales or bizdev.

Immediately a nice greeting.  Again, not a bad thing, usually I greet first, thanking people for the connection and wishing them well.  But, a greeting that talks, in generic, about future discussions.

They wait a few hours, and then, "hey, let me talk about me."

Nope, not relevant.

Do you even use a product like ours?

Did you even do any research before you contacted me?  I'm not doing your work for you.