I don't think it matters what you are selling and yes, I do think they are playing with something over there in searches. I am not sure what their methods to their madness are though. All I know is that every 2-3 weeks or so it is like someone flips a switch and all can see my store, even those overseas. In the past 24 hours I have had 5 sales and 4 were from my store (2 international) AND lots of questions. AND it always seems to happen on a Tuesday.
I know you all think I am crazy but that has been my "pattern" and I have an excel sheet to prove it.