No they don't. CO is striving to maximize the number of pax/plane and is just as willing as anyone else to sell $203 fares. By removing F seats from a 753, they are most likely getting 18 new $203 paying pax at the cost of 12 $500 V-fare pax because the excess Y inventory will sell in the low fare buckets. CO has got to be kidding itself if it thinks those 18 new Y seats will sell at H or Y prices. If anything these approaches discourage H/Y fare pax who will get tons more bang for their buck in terms of seat pitch and IFE at a LCC.