There's nothing in the marketing or T&C that I've read that says it's limited to 1 drink. Has anyone a.) been able to get more than one and b.) had FA's be restrictive to 1?
We'll have to see how AA deals with it, or one could simply ask. The language on the website suggests that there are "additional drinks to buy". Given that beer, wine, spirits, and soft drinks are included as, presumably is water, juice, and coffee, I'm not sure what else one would purchase besides more of the booze.
"Beer, wine and spirits are on us; plus the free snacks and soft drinks. Additional food or drinks may be available for free or to buy, depending on your route."