Not to be confused with gpt4all https://github.com/nomic-ai/gpt4all which is a "free" GPT LLM. It seems this gpt4free was basically hijacking 3rd parties services that use GPT-4, bypassing the official OpenAI APIs in order to avoid paying for inference. Of course, that means that the hijacked 3rd parties are the ones footing the bill... I'm not surprised they have been issued a takedown notice.
A bit like we are footing the bill for openai's training data.