Im not completely sure how the licence works on photography, but doing media we have to learn about using it for music and film etc, but the way it works with music is although they have to refer to you as the person who produced it, if youre unsigned they can use your material and not have to pay for it.
You have to be incredibly careful if you are a company using music. If its out of copyright then its OK, otherwise you have to provide reparations to the owners of the copyright, if they are found.
There has been some concern that the list of the people who havent been paid is getting bigger though. Companies supposedly try to contact for copyright payment but far too often they dont try hard enough.
You arent quite exact on what you are saying.
Just because you arent signed to a music company DOES NOT allow people to copy or produce it without paying! It is still copyright!
All material whether physically signed by someone as copyright or not is still copyright. I could put one of my books on here without any copyright notification or my name attached. If someone prints it and starts to sell copies I can still sue for copyright infringement.
If you waive copyright payment then they can produce it but you have to give them that permission.
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Zpyder, as BigSoy says you have to give them permission to publish/use your photo commercially. If you havent done that then you can still sue for damages.