This article is part of a nasty scam.
The evidence for this is that the so-called NASA engineer was not named and is not available to be interviewed. Equally important, the claims for the Supermag product are ridiculous. Nobody has ever come close to producing an "overunity", "free energy", or "perpetual motion" product. This company, Supervision Entertainment, has no prototype or working model to demonstrate and has never conducted demonstrations where the public and independent experts could test their claims.
The claims by Supervision Entertainment are typical of scams like the Tilley self-charging cars and the Steorn magnetic generator. The articles emphasize potential applications as if this was important. What's important is that such a discovery would revolutionize all of physics and make almost everything known today, information which helps us explore and exploit natural resources, entirely worthless. That's extremely unlikely.
Until the claims for this company are justified by a working model and independent verification you should save your money!