The claims about euphoria are certainly nonsense.
First off, for a neuron to do anything, it needs to be stimulated appropriately. None of the neurons that are sensitive to touch and pressure are in the brain:
Light touch is detected by receptors in the skin. These are often
found close to a hair follicle...
Pacinian corpuscles are pressure
receptors. They are located in the skin and also in various internal
organs. (...) Pacinian corpuscles are also located in joints and
tendons and in tissue that lines organs and blood vessels.
This means that pressing on the brain will not produce a reaction that is typically associated with activity in the pressed area.
Second, the brain areas under the "brain piercings" are nowhere near a center that could lead to pleasure. Emotional regulation is located in the limbic system (the labeled bits of the picture below, mostly blue and purple):
The closest thing to euphoria (a putative 'reward' center) has been attributed to the septum (labeled in the picture above as '(pleasure, reproduction)'. Also, note that stimulation in this study about the septum as a reward center, was done by way of applying electric current to the brain:
It is clear that electrical stimulation in certain parts of the brain,
particularly the septal area, produces acquisition and extinction
curves which compare favorably with those produced by a conventional
primary reward. With other electrode placements, the stimulation
appears to be neutral or punishing.
The punctured locations are not deep enough and they are not even located above the septum.
The text you linked says:
The foramens will be done on your nucha
- there is an especially sensitive range of a brain.
Being an aspiring neuroscientist, I found it disturbing that I'd never heard of this especially sensitive 'range' of the brain. But it turns out the nucha is actually the neck!
Nucha , nucha meaning , definition of nucha:
The back or upper part of the neck; the nape . The nape of the neck .
n . [ML . nucha , neck] The upper surface of the neck connecting the
head and thorax;
Finally, anecdotal data from the neuroscience institute where I spend my days, says that the closer the species to ours, the more easily the brain inflames when the skull is left open. Monkeys are very sensitive, rats can heal well. I would guess that a human would quickly get terribly sick from a brain piercing.