美国 Sam's Club 就是Walmart略高档的子品牌
台湾没有，但中国有，有刚需可上。
不同会员等级（像Costco一样)给予不同里数优惠
Earn American Airlines AAdvantage® miles when you join Sam's Club.
It's a win.
Sam's Club Savings or Business ($45 cost)
1,500 miles for AAdvantage®
2,000 miles for AAdvantage® Gold & Platinum
2,500 miles for AAdvantage® Platinum Pro, Executive Platinum & Concierge Key
Sam's Club Plus ($100 cost)
3,000 miles for AAdvantage®
4,000 miles for AAdvantage® Gold & Platinum
5,000 miles for AAdvantage® Platinum Pro, Executive Platinum & Concierge Key
https://www.samsclub.com/sams/html/aalanding.html?pid=AApageheader