You win some and you lose some.
My first time in Hawaii was with airfare and hotel for $87 with tax. I and thousands of others scored Airfare and 5 star accommodations at hotels like the Bellagio with Cirque tickets in Las Vegas all for free thanks to Expedia. I have lifetime free stays in suites at Fairmont hotels. There have been $250 tickets to anywhere in Europe. And of course there were the $336 El Al tickets that they honored with grace.
All of those “mistakes” were honored, but of course there will always be deals that are not honored. United didn’t honor the 4 mile island Hong Kong first class award tickets and the DoT agreed with their logic.
And now Alitalia is making up bogus retroactive terms on the Japan coupon that didn’t exist when people bought the tickets and using that to cancel people’s confirmed reservations. The new terms say “Offer is valid for departure from Tokyo and Osaka.”
The old terms did not say that.
I did write in the post that Alitalia may try to cancel tickets and that’s exactly what happened.
What can you do? You can just give it up but it is within your rights to file a complaint with the US DoT (online form) and the EU equivalent (mailed form)
Airlines are strictly regulated and generally can’t just cancel tickets, especially when it’s due to terms they forgot to write on the coupon page. However it is up to those regulatory organization to enforce their rules and they can only do so if people complain.
Others will say it’s not moral to complain about mistake fares, so I’ll leave that ethical decision in your hands, I’m just telling you your options.
To be clear, they are only cancelling the tickets booked with the $315 coupon. They are still running the 25% off promotion with which you can still get some great deals (JFK-TLV for $763, MIA-TLV for $729, etc).