P.S.
Погуглил и появились некоторые сомнения. Вот что писали о пассе с таким же названием года эдак еще с 2008-го:
Most flights are operated by SATA (0844 482 1678; sata.pt). TAP Portugal (0845 601 0932; tap.pt ) also has a few hops as part of routes to and from Lisbon. Through SATA, international passengers can buy the "Azores Air Pass" – not an unlimited-travel deal, but a system that allows you to book additional inter-island flights at reduced rates, as long as you buy in conjunction with your international flights. Fares start at £55 for the first additional flight and then £32 for each flight thereafter.
Well, according to SATA contact center they have a special fare for flights between the island, Azores Air Pass Fare. This fare can be used for passenger who are, or will be, in the Azores and have another international or domestic ticket.
I booked it and found out that it provides a discount of about 20% over the fare shown in the multicity section of the SATA website for the same flights. In addition. there is also a further small discount for senior passengers over 65 y.o.