I think this might be part of their rationale. Llama2 models have been used pretty extensively for these purposes and completely (gasp) for free, it's not creating any value for their investors :(
Otoh, not everyone has the frankly marginal technical skills it requires to download and use KoboldCPP, but using ChatGPT really couldn't be any easier. They and their investors stand to benefit enormously from redefining what they consider to be ethical while also limiting the impact on LLM use attitudes that derive from open source model use.