This is why I disagree with your claim that Microsoft is giving away VSCode away for free to promote their own proprietary tools. You can shame Microsoft for trying to improve their image by making VSCode, Typescript, ... opensource. To me this is totally different from bundling your own Browser into an operating system to increase artificially your market share, you can't compare the two.
There is nothing bad about not blindly trusting a big corporation like Microsoft, but I dislike it when people are so desperate to blame Microsoft for mistakes it did in the past, that they write articles that are (deliberately?) misleading. In this case, by saying parts of VSCode are opensource when it is just some extensions. This is putting VSCode on a pedestal with Chrome, but the comparaison is all wrong, Chrome includes lots of proprietary parts, while chromium is the opensource variant you can build yourself, but for VSCode this is completely different as the version distributed on the Microsoft website doesn't include anything besides the opensource code from Github repository.