I dont agree Unifi Bills only can pay 2 bills per week, I'm able to pay 3 bills at same day.

actually i think others might have misunderstood your question.

it might works..
1) bought rm100 cash vouchers with amex on weekend = 5%
2) purchase something at rm100 on aeon member day (you will entitled for rm10 voucher) and pay with the rm100 cash voucher = 10%
but this rm10 can only be used on next purchase, not immediate strike off current purchase.

i want to buy harddisk soon around PJ area. anyway can use amex ?

from the first page ALL IT got 2% surcharge, I check harvey norman price jacked up.

Anywhere else can recommend ?

last time u mentioned about paying Digi, Maxis, UMobile, Astro, Unifi, TNB etc

since Maxis @ Sunway Pyramid accepts Amex (i hope it still do), then you can pay U Mobile @ Pyramid too (i tried it before). Not sure about Digi, but nearest would be SS2 (from Pyramid).

Pay Astro @ Mid Valley

Unifi and TNB using M2U (select Amex) <-- I use this method, easiest evarrr.
Between MV and Pyramid, try the Digi centres/kiosks there to see whether Amex is accepted. This way, you only need to visit 2 malls in a month to settle all your bills.
need some legwork to hunt for amex acceptance. This topic is where ppl have tried, failed or successfully, and shared for our benefits

not to forget to search this topic for other updates. i might missed them out

cheers!