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> I could easily beat those 4 with a multitude of examples from both Apple and Microsoft that doesn't mean that any of them are untrustworthy

No, that's pretty much what it means. To varying degrees when you build on top of Apple, Microsoft or Google offerings, you're sharecropping rather than farming. Sometimes, they'll just find that it's in their interest to no longer lease out the farm to you -- or to change the rates/terms.

"Untrustworthy" might be an over strong term, if for no other reason than that invoking "trust" as a relevant concept in this context is probably itself incorrect.