Aadvantage dining has been pretty dead (to me) for a year or so, but suddenly it has caught fire. First, they offer 300 bonus miles per $30 charged. And just now, I got a notification/promotion for which I promptly registered offering triple miles at certain local (DC) area restaurants. And not bad ones, rather, higher end joints like the Caucus Room, the Occidental, Kaz (that seared salmon belly sushi is so luscious) and others. Assuming I can stack, this comes to 750 miles per $30 spent. What gives?