"...expensive burps"!
I don't know much about it, but it does seem a little different from the tales I've heard of microwaved water. At least here, there is a difference in chemical composition.
Oxygen does affect the body in various ways. Vitamins C and E are supposed to
counteract some of its effects, which is precisely why they are called antioxidants. The body can "rust out" from the inside.
Since oxygen can have both a positive and necessary contribution to health, and a negative consequence to health, something like "oxygenated water" really needs some scientific backing and/or proof before I would accept it as beneficial.
Blessings,
Green Cochoa.