Incorrect. You actually had to pay for the 12 month sub. The whole point of a promotion is to pay money now not just maintain a sub. You can google the promotion yourself and see (tyrael’s charger mount promotion wow). So once you paid for the 12 months up front you got the mount and D3 free once it launched then.
No problem but still shouldn’t have been removed since you had to pay for the year sub up front. There is an icy-veins article too which sounds like it is disappear from some people as well awhile back.