I am completely unsatisfied with the support offered for this program. I renewed my 12 month gold subscription in January (while the 2x subscription promotion was happening) with a 12+2 promotion card from a store, as it was cheaper than straight through Microsoft, and the 400 points for doing so never showed up in pending.
Never in the promotional material on the website did it state anywhere I could see that I needed to renew my subscription in a specific way (credit card etc) to receive the reward, and the rewards website even offers 'through a prepaid card' option.
I have spent an age with Xbox live support by phone (that was after taking a number tries, over a few weeks, to get through since the business hours for phone support fail to match anything useful in New Zealand entirely), who couldn’t help me with this issue, and quite frankly, weren’t even interested in trying, They kept me hanging on the line without saying anything for up to 10 minutes at a time. Finally they just said 'read the forums, we don't handle this' when the maximum allotted 45 minutes was up, and hung up on me.
Keep in mind I could see no links to any forums from the Xbox rewards website, and I had to use Google to find this one.
Very, very disappointed with this service so far.