Thanks Victor. It is not a matter of trust - it is a matter of unintended consequences. What might seem unthinkable - someone will do. This image should be extremely stained for other uses as it sports MATE's logo, but I'm thinking of future contributions. Also, if I understand SA correctly - there is no"...unless otherwise specified" option, because you can't have a more restrictive license than the one you derived your work from. (the logos)