I totally agree with tedbragg. They wouldn't be contacting YOU unless they thought it had potential to increase their income somehow. If you must, get a contract for the transferal/use-rights for the image with compensation amount specifically specified. Otherwise, their highly-payed army of lawyers will see your public defender in court...

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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