You must have a developer account or something. Pinterest, for me, is free and they don't seem to be placing ads or monetizing sales like Etsy. I only connect to Pinterest at 3 distinct times/places: waiting rooms, king conference room (toilet), and when I'm looking for inspiration and ideas (sometimes all in one :)...so I am probably not considered a hard-core user.
How does google search attempts equal 200 million USD...if that were the case searches for Obamacare or Affordable Care Act would have paid the national debt thrice over. [I just used a gov't example, I don't care what the healthcare bill is called]
Oh. http://www.google.com/trends/explore#q=pinterest