The sale of photos on the Internet may involve economic aid, the more time he spends, the more revenues are obtained. Take as an example to have 300 photos are accepted at 4 sites, the norm would be joining each month more than 100 dollars, not much, but there are many more photos income will also rise.
However, let us not fool ourselves, we must devote time, getting the thousands of photos are accepted at several sites takes time, we must constantly make and upload photos, each week, it must be borne in mind that not all will be accepted.
Naturally, we encourage to go see that your income will increase also, if you are constant.