Actually, Im going to making a stock account in the near future and yes, you can use any of it for your premade backgrounds....and also if i have something in my main gallery you would like to use just note me and I will do my best to help you out. By the way, your premade backgrounds are really great! I am just getting into photomanips and will probebly use some of them in the future!
I just mostly have weird stuff...patterns and abstracts and other pics...dont know if anyone can or would want to use them...but I will put animals and other objects on there too....Im just not sure if all the pics i have are big enough...what size do my pics have to be???