how do you get props ?

Someone gives them to you. They go to your profile and write something on your wall. If they want to, they can give you a prop.

basically, if a user goes to post on your wall, they have an option to give you a prop or not. (you also get the option if you are going to post on their wall)

You get them from others, others can give you props by posting them with the comments.

You get props cause someone gives them to you.

your fans or someone else can give you props.