Oh, I've almost missed the fun
Good luck to the guys doing trial. I'm not sarcastic... almost.
However I think this is one of the cases, when 30 days is a wrong duration for the trial. Remember, that Steve got the idea of the 30-day trial from shareware development. What is good for software is not necessary good for the body. I wouldn't advise 30-day fast, or 30-day water fast. 30-day abstinence falls into the same category. Unless I misunderstood and the guys want to stop masturbation, but allow other sexual activities.
I think that whoever tries 30 days abstinence is bound to have wet dream in the second week. So one week trial should be enough to see the benefits. And hardships.
I've done something like this trial in my teens, when I was ashamed of masturbation "marathons". And indeed, when you go from 12 times a day to say one every other day, suddenly, the productivity have risen and I got much more energy. Surprise!
Shamou expressed doubts that it takes time to recover from ejaculation. I noticed it to be true and different for masturbation and having sex with a woman. I'm not sure about underlying physiology, but I guess some endorphines play their role in it. I noticed, that if I have two orgasms in a row, the first one is draining and the second one is energizing, so it may have something to do with a length of the arousal stage.
Anyways, if this habit stays in moderation (and moderation is different for different ages) it is healthy and actually useful.
Currently, we have a PUA infestation here in Russia. Young kids, who have no experience, little money and an acute testosteron "poisoning" are going to seminars that "teach" them how to get laid. It is extremely uncool among them to masturbate. Of course they do it anyways, starting yet another tradition of masturbation hypocrisy. This hypocrisy as usual make them ashamed of masturbation and does not let them explore their bodies, learn to control themselves and ultimately prevents them to become better lovers, fulfilled men.
However frustrating, the period when I was a dork and couldn't get a girlfriend was very productive for me in terms of personal development in general and sexual development in particular. Masturbation was an important part of that development.
If was cool and popular I would never learn the delicate techniques dealing with sexual energy, Tantric practices. I wouldn't know that men can have not one but at least three different kinds of orgasm and how to achieve them. I wouldn't know that the "usual" sex is just a start of an amazing path, I'm still walking and exploring.
And I wish good luck to the participants of the trial, because, whatever the outcome, they take the first steps along the same path. I have doubts that the step is the most optimal, but it is conscious and it is a start.