from the ads I've seen it all looks like dollar store stuff. worth what you pay for them I suppose.
Makes me cross though that shippers from China get USPS subsidized shipping. I no longer send cards to friends, which I love to do just because, because it costs so much. I can order a trinket from china and they get subsidized. Forbes has a good article about t.
re: ads on facebook. I Never see any. None. use the control key plus the + key to make your screen bigger until the sidebar disappears. If you see ads on your wall, that is on your account settings.