I have no clue as to the promo, but codeshares on other OW airlines are fine.
151N . * TRAVEL ON ANY QF/AA/AX/CX/BA/LA/LP/AY CODESHARE
152N . SERVICE OPERATED BY QF/AA/AX/CX/BA/LA/LP/AY IS
153N . PERMITTED. OTHER CODESHARE SERVICES NOT
154N . PERMITTED.