> A persistently visible ad for a paid service you don't want, in a paid product you paid for?

Yes, this bad, but outrage described in the article is not because of this.

All unhappy customers are complaining the plugin sends the data and they cannot uninstall it.

It is opposite: they need to enable it, accept terms and start paying for the service and only then they concerns might be correct.

I am not even JetBrains user but this is just a FUD for me