This has been done so much already, it's nothing but exploiting people for a buck and "recognition" as a photographer, if you wish to call it that. Whether he is making a dollar on this particular project, and permit me to doubt his word, I guarantee it leads to gigs and media talk, which in turn lead to money in, guess who's, pocket. He isn't one of the addicts he's shooting, he doesn't live on the streets, he doesn't know sh*t about what those people are going through. Is he plowing all profits into addiction treatment centers? Safe houses? Homeless shelters? I think bloody not. Karma baby. No one escapes it.
There are so many people doing good things in the world and they never once shout "look at meeeee. Aren't I great"! The ones making a difference keep their mouths shut and go on about their business. For others, it's just about ego stroking.