Sure but that's not QA Engineers Performing Job

Yes, you’re right. I was just quickly lumping any contractor whose job is to run tests from a test case sheet under the QA umbrella. I guess a more likely title is Product Market Analyst, or something like that. But I was mostly stating that I don’t find this weird at all. I definitely have looked at competitor’s API’s, for example, when designing my own. I would find it weird not to.