This really depends on the cost/benefit tradeoff for the entity in question. If using ChatGPT makes you X% more productive (shipping faster / lowers labor costs / etc), but comes with Y% risk of data leakage, is that worth it in expectation or not? I would argue that there definitely exist companies for which it's worth the tradeoff.
By the way, OpenAI says they wont use data submitted through its API for model training - https://techcrunch.com/2023/03/01/addressing-criticism-opena...