Big Brother Contracts / More Spinoffs

Why does CBS keep Big Brother/Survivor players in these long contracts if your not gonna use them, that needs to change I feel bad for those who want to do other things but legally can't because of a contract.

If your gonna keep them in those contracts USE the players on a new BB Spinoff or Reindeer Games, I still don't know why they never use old BB Players.

Another point - BB could do just fine by being 70 days so It gives a spinoff some room on CBS

(So depending on the year it would look like this)

- Feb - Celeb BB or Big Brother Spinoff
- June - August (depending on start): Regular Big Brother
- Dec - Reindeer Games

What do you all think and how would you fix these problems?