a new start-up magazine is interested in publishing 2 of my photos (portraits) ... im not worried about model releases cause the photos are of me (but i do have releases for all my photos).. there is no pay involed, just photographer's credit. ... but for the first time im a little hesitant about giving my files to someone (their all digital). for my art exibits, i control everything, i bring the photos already framed to be placed on the wall, if someone wants to buy them ... its processed through me ... i dont feel good about releasing my files to anyone .. do i have a valid concern? ... is this customary? ... can i control the number of times they can publish them? ... i dont want to give them free reign that they can use my photos over and over again ...i dont want to sound too difficult to them or come off too strong ... i just want to protect my stuff ... how does this publishing stuff work? :?