I suspect that Vibrant is simply a form of carbon dosing considering it has vinegar in it.
But the tests that analyze what is in it indicate that is not the case. In my mind whether it actually has bacteria, carbon sources, amino acids, etc is all irrelevant if the test show that it is largely composed of algaecide and UWC has been dishonest about it. I mean if I took a strong antibacterial like chemiclean and bottled it with some bacteria and sold it as a magic bacteria to eliminate cyano that would be pretty darn dishonest.