ChatGPT+ subscribers can prevent OpenAI from using their inputs as training data. That is, so long as they forego the service's second-best feature.
How to Ask ChatGPT a Technical Question (BoorishBears on Hacker News)
“Any time you ask ChatGPT a technical question on something you're not familiar with it should be three parts: 1- What are the considerations?; 2- Implement it with the considerations; 3- Did we forget anything?”