Amex Card payment offers - Not available on SBI Unipay or HDFC Portal

As amex isn't live on bbps system, we are left with options like neft, or something like cred

Sadly I can't find any good portal to pay it

Side note: Amex are forced cards in my opinion:) where we are urged to use it always:) with handsome rewards as bait, making us in spending spree without realizing so be careful with Amex:)

use mobikwik

Which DCs give rewards for the payment through Mobikwik except Millenia?

Now, which is best way to pay for amex ? any good UPI payment apps with some cashback