"great lie" was pj's phrase, not mine, but I took that to mean "perennial tar-pit". FB might succeed but a long string of similar social media businesses have f

"great lie" was pj's phrase, not mine, but I took that to mean "perennial tar-pit". FB might succeed but a long string of similar social media businesses have failed to pin down the whole revenue/cost thing. It'll have to be something very different from display ads.