hey to all the sifus here, few questions i want to ask =P

(I am only eligible to apply for the gold cards)

1) No cashback given on weekdays at all?
2) If the place accept AMEX, then confirm I will get the 5X points?
3) AMEX can be used for online payments? (umobile bill, lelong.com.my purchases, TNB bill)
4) Not listed but just in case someone already went to these places, could you tell me if you still get 5% or not:
- Shell station section 17 IZZARA/CHIN NYIT SIN
5) I know the points can be used to rebate GST (12500 for RM50), but other than that any use for it? I'm considering whether or not to get another card (ocbc titanium) for non-weekend transactions if the points are not very useful. Any forums that has the full list of claimable items?

Finally, apologies for asking all these and not researching myself. Honestly I try to find and read but sometimes the more I read the more confused I get :S. Really sorry for inconvenience caused! Thanks in advance for your replies!

is there any way i can use AMEX to pay for other card bills (such as UOB ONE)? XD

awww... and i thought i can get like a haxx0rs system whereby i enjoy 5% off with UOB, then pay with AMEX and enjoy a further 5% WAHAHAHA!!! *dreaming*