1. It’s not a scam, it works, but unfortunately exactly what exercises and what intensity is right for your penis is something you have to figure out on your own. Just because something works for someone else, and they got crazy gains, doesn’t mean that you will.
2. Stretching and jelqing in a direction lower than horizontal will stretch the ligaments and will lower your erection angle. I myself regret stretching in a downward direction because my erection angle went from about 45 degrees above horizontal to basically horizontal. I preferred it before.
Luckily, you can stretch and jelq in an upward direction and concentrate all the forces on the tunica, avoiding stretching the ligs.
3. Once you condition your penis, clamping and manual squeezes (what I prefer for the sake of safety) will be your friends because they target girth the most. I basically started gaining girth when I started doing manual squeezes.
4. Less is more. Don’t get greedy and start increasing your workout times and intensity. Days off and deconditioning breaks are just as responsible for gains as are the actual exercises. Do the minimum amount of exercises with the minimum intensity that still yields results. That will minimize the risk of injury, loss of EQ, and ensure you can keep gaining long term without resorting to more and more intensity, which leads to injury.
5. Ensuring that the tissues of your penis are hot, either through a hot wrap, rice sock, or doing your exercises in the shower is one of the most important things PERIOD.
It makes the tissues stretchier, allowing you to get more expansion, and thus bigger gains, and they also reduce the chance of getting injured.
For a long time I didn’t buy into warm ups, and I got lots of (luckily) small injuries and I experienced shrinkage after exercising and a loss of EQ without noticeable gains. Once I started doing all my PE in the shower after letting everything get nice and hot for 5 minutes, I stopped getting injuries, started seeing gains, and improvement in EQ.