To answer both points concisely:
1. I wouldn't say that OpenAI has been "dethroned," but the availability of GPT-3 and similar AI technologies to a wider range of users certainly represents an expanded playing field.
2. It's true that, with the widespread availability of GPT-3 and other AI systems, it may be difficult or impossible to limit their distribution entirely. However, there are still strategies being developed for identifying potential misuse and mitigating these issues as best as possible.