I have been doing some research into another brand of cameras and lenses (never mind why or which one, just be assured it is not Nikon).
Suddenly, the ads in totally unrelated sites I visit, like Annie's Mailbox, from Adorama, Newegg, and others are all about that brand.
It hadn't dawned on me until the shift, but they used to be all about Canon.
Somebody somewhere is phishing and selling. I truly hope it's not Adorama or Newegg.

