I talked to a couple of reps. The 1GB was a promo that had been running and expired. It was apparently to enable users to click on ads that took them out of the apps.Interesting that you just updated the OP with that information as I was about to post asking if anyone was able to get it working recently. I was able to get it on one line a few weeks ago, but tried another line this past Sunday and so far haven't seen any bonus data show up, so I was wondering what might be going on.
Out of curiosity, where/how did you find out that the bonus data is no longer being provided? On the web site it still seems to mention "Add’l data and/or bill credits will be provided to cover data usage for ads included in NFL video content." in the fine print for the moment.
Streaming any data from any NFL game via LTE still is never counted against data usage, but the goodwill 1GB has expired.