JetBrains here. For clarity, non-commercial doesn't just simply mean individuals. It's a special type of free license for non-commercial use: education, hobbies, etc.
We are communicating this change via a blog post, emails to users, and in-product. With the 25.2.4 update (in two weeks, October 14), non-commercial users will receive a notification about this change and will be able to review new agreement and take action before any data collection happens. For the rest of the users, nothing is really changing unless they are willing to contribute.
> We are writing to let you know that the data sharing settings for our non-commercial tier will change the next time you update your JetBrains IDE. If you don’t want the settings to be applied, please read further for how to opt out.
You knew full well from the beginning that this would not be popular, otherwise it would be opt-in, and not opt-out. Great way to ruin your company's reputation.
We are communicating this change via a blog post, emails to users, and in-product. With the 25.2.4 update (in two weeks, October 14), non-commercial users will receive a notification about this change and will be able to review new agreement and take action before any data collection happens. For the rest of the users, nothing is really changing unless they are willing to contribute.