Combining Ultimate Game Cards

[SmallKid]

Hi everyone, can I combine 2 $5 Ultimate Game Cards for 1 $10 Ultimate Game Card?

I'm trying to get Runescape membership but find it harder to get points after I have done loads of offers.

 

[rue]

I know for a fact you can, so yes.

 

[SmallKid]

How do you do it then?

 

[rue]

I believe you separate them by commas.

 

[-Ryan]

I don't believe that this is possible but I never understood why. Personally, I think there should be an option that lets you enter multiple codes.