Zuzu I checked the code and have to give a small correction: you get 0.5 acorns for moving an image EXCEPT when it's your own image. You get no reward for moving your own image.
Also, on importing an image, it's the same thing. You don't get half an acorn for importing your own image. You still get the acorn for having your image imported, but you don't get the full 1.5 acorns. I hope that makes sense.