What’s old is new again. The advent of the World Wide Web, nearly a generation of photographers ago, seems to have induced an institutional memory loss about basic principles of commerce. — PDN-Online (Photo District News), the most influential photography trade publication, on February 7, 2018, published article titled, “How Photographers Charge for Social Media Advertising Jobs,” It stated, “As advertisers shift more of their marketing dollars from traditional media to social media, reps and photographers are changing the way they calculate…