Do they?
* I don't believe Microsoft offers support for their free products to people who haven't bought an O365 licence, and instead you have to use their god-awful Microsoft Answers forum (they seem to change this up every few years though so this might not currently be the case). It's community support so if you're having an issue with your account this won't help you, but if you're confused about how to use a product Microsoft makes you might get a response.
* Apple doesn't have any free products (even if you have only downloaded free apps and listen to free audiobooks, you have to run it on hardware you purchased from them).
* Similarly, Amazon requires you to pay in one way or another (Buying an item, paying for prime to watch prime video, etc) to use any of their services. AFAIK AWS doesn't have free support.
* Facebook has a "help center" that's marginally more useful than Microsoft's, but it has the same problem... it's all community support so nobody can "pull up" your account to fix any real issues (like being locked out).