I lost my Prime 1 Year free membership because of this.
As stated they should offer 1 year free no matter what plan we subscribe to. First I was on the 'Gold' plan before then downgraded it to the 100Mbps combo plan as 'Data' was such a huge pain in the ass back then with their old plans.
And yes they did deactivate it immediately. Now when I call the cc up they tell me that it was just an one-time offer and was deactivated due to the downgrade of the plan.
Still does not make sense as it was clearly meantioned no matter what I would be getting that 1 Year Subscription. Even TOS does not have this listed. It is completely unfair.
But it was only an one-time offer, Hence I did not bother much about it.