I've been subscribing to PCA for a while now and it's always had an extra flap on the inside of the front cover, extremely useful I found for use as a bookmark. You could nicely tuck it into the place you were at and it didn't fall out like regular bookmarks, but, if the July issue is anything to go by, it has been consigned to that great waste paper bin in the sky. Extremely sad now :-(((
I think there is a industrial dispute a the flap factory. I found it a little annoying when you got towards the back of the mag it just would not stay in place. Eureka. DVD or CD edition, flap or flapless edition
TopCat and laurie53 are correct - whether we have a flap or 'gatefold' (as we call them in the trade) depends on what the advertisers want. The gatefold has been a popular advertising position for a while and it may make a return in the future.