Depends how you look at it. I'm an amateur photographer with a little skill. If someone wants to use any of my photos for any purpose, they are welcome to do so, provided they ask of course. There is one website that uses four of my pictures, and I'm chuffed that they chose my photos. The emphasis is amateur of course, my pictures have no commercial value, because I do it as a hobby.
Yes, your pictures have no commercial value because you don't charge for them, that's all.because you set no value on them: you should do, other people will.
I am also an amateur photographer, but if somebody were to want to use something I have on Flickr for commercial purposes, I'd at least charge them something, because to do otherwise devalues photography and is bad for people who do make a living out of it. I get very cross about how many chancers out there expect to be able to get everything digital for free.