I want to give my users a set of precreated backgrounds with my theme. To find generally beautiful photos I used compfight.com (http://compfight.com/). But the thing is, they are all free to use for commercial purposes, but I have to link back to author.
Now, here’s my problem. Where can I put that link? Does it have to be visible in front end or can I just place it in documentation and theme options?
BTW: this is the general licence of these images http://creativecommons.org/licenses/by-sa/2.0/#