Credits are used to buy stock photos, illustrations or Flash files. Once you've bought some you are free to spend them on anything within the Stockami collection.
Yes, extended licenses are available too to help cover all of your professional needs.
Once you have credits in your account the following options will be available to you:
Yes. If your credits haven't been used and were purchased within the last 14 days contact support who will be happy to help you.
No! Credits do not expire, they will always be here when you need them.