I'm not saying they came up with the term before anyone in the world. While the term was used previously, it didn't have the concrete definition it does now. That's why they were able to do what they did.
I can understand that position but... they tried to trademark just 'open source' - without the 'initiative' part. They were told to rod off by the USPTO because you're not allowed to do that, so it's not ok by the law, whatever you think of it.