8 SWUs issued when you reach EXP with decent availability to use them. I spent a few years late 00s/early 10s flying to Asia a lot. AA didn't have the coverage in Asia that UA/CO and DL/NW had (AA served NRT only for a while), but the easiest upgrade instruments made up for that.
Then there was the brief MRTC experiment, which is probably what roped me into AA in the first place. And Bistro flights.