I have a question, do these codes expire after a time period? If so, how long is this time period?
I might need one of these in the future but want to buy one now in case the offer expires, but if the code expires there won't be a point to that.
These codes are valid until the end of this year. You can redeem a code any time this year. After you add the code to your Bing account you have 90 days to spend the credit like Superiorus said.