It is the effect of the Internet of course. Magazines could (and did) publish articles that other magazines had covered and they they themselves had previously

It is the effect of the Internet of course. Magazines could (and did) publish articles that other magazines had covered and they they themselves had previously covered, which boosted the number of "editorial" pages, which gave them more pages for advertising. Most editors were sensitive to the ratio of editorial (content) to ads. That ratio indicated a level of "seriousness" to the content, if it was all content ("a true journal had no advertising and is bought for its cutting edge knowledge") to mostly ads ("an advertising vehicle with some grabby headline to get it into your hands.") Price was proportional to, from very expensive (journal subscription) to free (weekly advertiser).