Earlier quoted context omitted.
Monopolistic regulation? This is clearly aimed against existing monopolies, i.e. gatekeepers. Can you explain how ensuring that 1. Making unsubscribing is as easy as subscribing, and 2. Guaranteed interoperability between instant messaging services, and 3. Sharing marketing and/or advertisement performance with business users will "kill competition"?
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This regulation increases freedom for everyone (users and businesses), except for large platform operators.
You as a user are free to continue exactly as you were, and if you are a business that is not Apple or Google you have more flexibility and freedom to choose.