I think that last part is what the "product" is. Train it with a large data set, learn to constrain it, and give it a more fixed scope AKA customer support. Retain the best of your existing staff to monitor, review and train it in an ongoing way. Use them to deal with "outliers" and "new features".
People may loose jobs... but do companies want this? Can you imagine where google/fb/twitter/insert company name here no longer being able to hide behind "No one can reach a human"....
It's not a meaningful restriction. Even if they were good at catching accounts doing this, the community that wants an open-source chat assistant is so huge that you could easily find many people to share their API keys or install a browser extension to share their chats.
Even that is not needed. There is enough people that want open source ChatGPT clone to create the dataset from scratch by themselves. The Open Assistant community actually already created enough training data for the initial model training and the data will be released under open source license. And from what I played with the initial model, it looked promising (though not anywhere close to GPT 3.5 yet).
Might as well make it cheap and easily portable and fine tunable