Your son is 13. He's in 7th, maybe 8th grade. He doesn't need a throwing program, especially a 10 week, 30 session program. That is a lot, even for a high school aged player. If anything he should be taking a break from throwing. At 13/14 up kids don't have the rubber arms they had at 9/10/11 where they can throw everyday (games, recess, stick ball, etc), you don't want him to hurt his arm. Really no benefit to playing baseball right now (other than fun), but arms need rest too.
As far as him projecting. He doesn't project as anything yet that is nonsense. If he wants to pitch, let him until he is not good enough to do so.
If you can get your money back I would. Or maybe push it off until Jan/Feb and have him use it to gear up for the season. I would nix the throwing program and find a good pitching coach for lessons around 2 months out from opening day.