Regarding free non-commercial use in Jetbrains you need to accept that you'll get checked (not specified how, but I guess they will scrape your HDD? Or what? It’s also important to note that if you’re using a non-commercial license, you cannot opt out of the collection of anonymous usage statistics. This is similar to our Early Access Program (where statistics is opt-out) and in compliance with our Privacy Policy
It's the dreaded T-word: telemetry. The same sort of thing people get up in arms about in Windows but JetBrains will get a pass here.
Catch JetBrains doing something dodgy enough and there will be a similar shitstorm against them.