I thought I would open a debate about when or if you should do something for free. Although I make a very good living from photography, I still sometimes do things for free. Before anyone tells me "doing stuff for free devalues your work and status", I would like to mention two business models that did ok out of it. Facebook and google. You might say that they are different to us, but are they and what could we learn from them as photographers? Personally I do free shoots if.. 1: They will open up new contacts or areas I have not been introduced to. 2: It's for a charity auction. 3: I want to try out new concepts that I will later sell to the wider public 4: It would be good publicity Your thoughts?