I don’t think everyone sat down and agreed to that being what plus means. It’s like labeling food as organic, it means nothing. It’s just a name. Odd thing to obsess over, you’ll get nowhere trying to understand marketing people, just let it go.
What they are adding is a more condensed experience accessing NASA content and making it easier for casual viewers to access. The more people paying attention to science the better. I think this is a fantastic move from NASA