a real hard hard block example.

CO bought a hard block on the iad-lhr virgin atlantic flights. the front set of seats in upper class showed up available on the virgin. the back set on CO. in winter, CO would have a biz class sale(co had no first). the CO seats were around $1000. virgin sold the seats as first class for over $6k each, and sold very few. sort of ended up looking like a UA first class.

don't see that little discontinuity now, but maybe it will show up if
CO has their regular winter biz class sale.