In the linked article, they say that this is distinct from erotic asphyxiation:
Reasons for practice are distinct from erotic asphyxiation. Steve Field, chairman of the Royal College of General Practitioners in London,[4] claims that the fainting game is pursued primarily by children and teens “to get a high without taking drugs.” Children “aren’t playing this game for sexual gratification.” It is frequently confused with erotic asphyxiation, which is oxygen deprivation for sexual arousal. Unlike erotic asphyxiation, practice of the fainting game appears to be uncommon in adulthood.[5]
In the linked article, they say that this is distinct from erotic asphyxiation: