While I agree it's common courtesy to mention merchants and freebie creators in any given image, I'm not sure I think it should be a requirement to mention them. At least for things they paid for because, well, they paid for them. If it were a printed image, the artist of the final image isn't obligated to mention everything they used in the image - stock photo suppliers, etc. Shouldn't be for digital images either ;o).

It is nice to mention them though, I agree :o). I just don't think it should be mandatory.

Laurie