"It's free real estate" is a meme based on a parody of late-night infomercials touting quick and easy money but are actually bait-and-switch scams.
https://knowyourmeme.com/memes/its-free-real-estate
The other two bits are probably meaning that the phone company can make money selling your location and make money charging you to change phone numbers every so often to avoid tracking efforts by people who only have your old number.