What is iStock Photo? - It is a website that you submit your photos to.

How can I make money from iStock Photo? - Take pictures and submit them to the site. Customers will purchase the use of your photos and you will get paid.

How much money can I make? - unlimited. The more GOOD and rare photos you submit, the more chance that you get more money.

How much time do I have to invest in it? - Time in taking good pictures, time in editing them, and submission time.

Does it cost anything to sign up? - No, it's FREE.