Are you suggesting that FJ itself is doing the work of clipping out attribution from content their users upload? Huh. I haven't visited FunnyJunk before, but

Are you suggesting that FJ itself is doing the work of clipping out attribution from content their users upload? Huh. I haven't visited FunnyJunk before, but from what I read the users gain reputation/karma or something similar (but not money) by posting original content that gets lots of upvotes/views. So honest users are motivated to create something high-quality to upload. Dishonest users are motivated to remove attribution from someone else's high-quality work. I don't think you can pin this part of the problem directly onto FJ (though that's where the site revenue goes). "Follow the money" assumes there aren't other motivating factors.