There are legal limits to how long the data can be stored for. (I want to say it's a federal 7 year limit, but I might be wrong and it might be state laws). Eventually it all times out and your credit resets.
That's not the issue. They are required to immediately remove incorrect information from your credit report. A freeze prevents them from reporting your credit to third parties (i.e. it prevents them from doing business). So, they hate people who freeze their credit. Their strategy seems to be to make having a credit freeze so onerous that you won't do it so they can continue to sell your information to their customers.
