Is this news?

I've been aware that BA does all of these things as part of its market segmentation for more than a year now (maybe 2 years). This topic has at times come up on FT, though not so succinctly or eloquently put. I'm just a dumb passenger, not in the travel industry, but I've known about it; and that many other airlines (both in OW and elsewhere) also do similar things. Plus more routine yield restrictions, like B-C being zeroed out but lots of inventory for A-B-C (A being either a different city, different fare product or a different distribution channel). I think the various GDS computer systems added this capability, with Amadeus being maybe the first, and the airlines started using it. It is called something like ticket quota and was part of the e-ticket rollout (I guess the airlines could control how many thousands of tickets were issued by the physical paper ticket stock; with e-ticket they worried about someone issuing a few million tickets in a few seconds ... and that control capability was expanded for other purposes...).