I start to realize how synchronized big tech is acting currently

• google experiments with blocking youtube users with ad blockers
• twitter blocks unregistered users, heavily advertises its app
• reddit blocks api and 3rd party access, heavily advertises its app
• microsoft creates windows 11 lets windows 10 users with old hardware insecure

Is this because they all act in unison? Or is it the general ecnomic situation (low prime rates by the central bank) of the American tech giants that leads them to "coincidentally" making the same decisions? My suspicion is its the latter combined with the power they accumulated over the past decade.