AMEX biz plat is $695 a year, so it's an expensive card to carry in your wallet, but if you utilizing it right, it can wield many times of the values of its annual fee.
Today I booked AA flight from Chicago to Shanghai next fall, thru amex using points, platinum card gives 35% back, so RT in Econ after points rebate be technically 877$.
plus few days ago I mentioned DFW - PVG A/C upgradable seats wide open from now to end of time, and I spent enough money thru Citi AA card earned 4 SWU certificates, so called in to AA used the upgrade certificates to biz class , pick the seats in biz, so its now done deal.
lol, this is how you get RT biz class to China which costing $9000 for $900.
found this write up on internet, not much of anything new but still interesting to read.
https://upgradedpoints.com/news/amex-business-platinum-annual-travel-savings/