Often you’re the product even if you’re paying, but definitely if you’re not paying.

Santa brought a few of them for my kids last year. Crazy what happens in his workshop.

I also happened to see something similar at my ace hardware store where they sold old timey gifts.

You should do one for how much house you can sell at different interest rates (\s). When you have bought a house and not died already, you might want or need to sell it. It’s useful to understand those dynamics.