It depends on you. This is a great site for uploading and selling your art. But if you just upload your images and don't market yourself, you won't be too successful. FAA does not do marketing and promoting for you.
i sell quite well though june is usually quiet for me. you need lots of good work, lots of good tags, a description for each - and you have to promote yourself, this site won't do that for you. but there is much potential.
Yes you can make money selling here. The key to selling though is marketing your work. I use free tools like Facebook, twitter and a blog. Anything you can do to bring attention to your photos the better. There are some great threads on here about marketing. Welcome to FAA and good luck :)