Minimum practical "support" for a game like WAB to keep going:
1. The rulebook should be available for purchase/download.
2. If the game is going to be based on army lists, then a complete selection of army lists must be available for purchase/download.
3. Errata/addenda must be available for download.
If WAB was mostly played as hosted participation or demo style games, most of those wouldn't be necessary, as all you'd need is a guy running the game to be familiar with the rules. But that's never really been a popular way of playing WAB. WAB players play competitive style pick up games or tournaments, all based on points, army lists, and arguing over rules.
You need the above rules & documents for that.
As others have said, it will also be virtually impossible for new players to join in as well, limiting the game to existing players minus the ever increasing number of those who lose interest or wander off. That, in a very practical way, spells the death of WAB.
I've had a lot going on, and my friends and I haven't played lately. (I did run some demo games at Cold Wars.) But we were just starting up again. Some guys are getting together this weekend, and a few of us were planning on playing at an annual gaming & cookout weekend coming up. I was finally about to buy AoA2 -- now I can't. That right there is going to kill it for me -- and I'm a long time supporter (since the beginning!) not a new player. I apparently have just lost out, since it wasn't advertized that AoA was a "limited time offer."