Your images are free for you. I recovered an image that I hadn't backed up before my old PC died. I still had the original, but by downloading from StockXpert I recovered all the IPTC data (only in the original size, the downsized versions don't have it).
123RF lets you do that too, and I noticed their files are smaller than the originals, as if they compress the JPEG you send them. StockXpert's however is the original file.
Regards,
Adelaide
PS: Check someone else's photos and you will see the credit prices in that "Free for you" column.