It is really difficult to make a profit fromn things like photographs, drawings, writing, etc. even if they are of exceptional quality.
There is however a certain amount of self-esteem that can be bolstered for a job well done in any endeavor and if you are passionate about that job then the reward for the creation of that item is in the creation of the item itself, not so much as to how much money you are going to make off of it.
If I were Justin, I would consider multiple things, one of them is to create these photographs so that they can be placed in pool rooms around the world. I would install a signature on the photograph for posterity along with a caption underneath the photograph. I would offer a medium for having the photographs printed, matted, shipped and mailed. There are businesses that handle the entire process.
In addition I would offer the electronic files (photographs) free of charge to those who might simply want an economical poster for their wall or pool room. Like some have mentioned, the cropping seems a little too close but art is and will always be in the eye of the beholder. For me, the Z-shaped eyebrows of Efren Reyes, when he is really bearing down on a shot are unequaled in interest, at least for me.
One of my pool buddies has a wife who took black and white photographs of the women of strip clubs in New Orleans. She did so well with the photographs that a book was published using the black & white medium, called Friday Night Grind by Jackie Brenner. (She also took a lot of b&W photographs of the pool players of the infamous Sports Palace of New Orleans but those weren't published or shown.
I'm not sure why the black and white medium attracts most of us, maybe it's the connection to the past or that to some of us, it simply looks good.
Regardless, if I were Justin, I would first consider making my goal to place my best photographs in the hands of those who would appreciate them the most and that would be the pool rooms of the world, both public and private. A financial reward would be a secondary goal.
In so doing, I might even limit these photographs to the TAR players, at least at first. There is a certain allure that comes with limitations and limiting the photographs to that particular group of players might not be a bad idea. That way the signature becomes a brand of sorts.
Going one step further, with profit in mind, the photographs could be signed by the players themselves for a fee, mounted and shipped. That way, the players and Justin might be compensated for their time and effort. Again, it really isn't going to be about the profit so when we are all dead and gone, some of our personal testaments to this world will be all that is left for posterity.