Extras Credit
For international calls, roaming and premium services
I get 10$ a month of extra credit. What can I use this for? I don't have any relatives overseas and I'm not really interested in phone Sex.Can you use it to buy steam credit or something?
Use it to invest in stocks or buy McDonald burgers.
On the serious note, it already says what your can use it for, if you don't know what "premium services" are for optus, look it up. Is steam even affiliated with optus?