This is in the same vein as MASSIVE DEAL ALERT: Amazon offering 20% off (up to $100) when you use an American Express card and r... except it's a flat $30 off any purchase $60 or more. Means you can get Vega 56 for $270. Promotion lasts through the end of the year, so should still be good when Navi and Zen 2 rolls out.
https://www.bgr.com/2019/05/21/best-amazon-deals-amex-promo-30-off-60/?utm_source=bgr&utm_campaign=topdeals
