I created a lens which cuts out the user's face and places upon any picture of the user's liking. Me and my friend really enjoyed using it, it got removed three times for not utilising the camera. I have found another filter that does something similar but with a circular mask (mine fit's the face) and replaces the rest with a green screen. (https://www.snapchat.com/unlock/?type=SNAPCODE&uuid=3f6c871154ef4f2cbb3c58761941eea9&metadata=01)
Can someone please tell me how to prevent this?