The value of data declines over time, often rapidly. Think about what a business would pay for current user data, data one year old, data five years old, etc.; who buys five year old data? I suppose it depends on the application. Imagine how your life changes over time, an accumulation of small and large changes. Data on your health, finances, social network, interests, politics, activities, etc. was different 1 year…
You are just wrong. Some of your data such as health data stays constant throughout your life. Especially for guys living with chronic conditions. Your key identifiers stay the same too. E.g your phone number etc. These are then used to re-establish your advertising identity. This theory that old data declines in value couldn't be more wrong given that the "old" data is never deleted. Just waiting to find its origina…
You could be male, female and any other gender, any race, any job, work as a CEO and a janitor, live both in Russia and the US.
You could probably do this to Google search.
Edit: Apparently somebody already built an extension which does exactly this for Facebook. https://floorvandenberghe.be/derivedscrolling/