Sourceforge died in a very different way though. Bundling spyware/crapware in install packages for open source software was a serious breach of trust, and was pretty much the direct reason for mass migration to Github. Github is failing on the technical side, but they at least mostly have their brand value intact. I think it will still take quite a lot for a mass migration of the same scale to happen.

Microsoft specializes in taking successful products and pumping them full of malware, spyware, bloatware, and adware once they have a critical mass of users. It is often preceded by quality dropping significantly due to under investment and McKinsey being brought in to find a way to prop up declining revenues - of course the answer is never to invest in making it a superior product again, but monetization strategies.

Mostly, but they were injecting ads into PRs if I recall.