Pay more, get less

CBS and NBC jumped into the game, not wanting to be left behind by Apple and ABC. On the surface, it seems cheaper, after all it's only 99 cents instead of $1.99. Here is the problem. You buy it, download it, and it self destruct after 1 week. Great, basically I'm paying to record the show, watch it, then it's gone. Instead of either recording it myself, or buy it from Apple, and keep it forever. Why do companies keep coming up with products that cost more, give you less, and control how you view it at all times?