Just because some colleges list them as "optional" doesn't mean that you shouldn't take them. If I have applicant A, who scored a 1650 on her SAT and got all A's in high school, and applicant B, who has no SAT score and got A's and B's in high school, chances are, I'm going to go with applicant A.
Take them. Trust me, this is a hundred bucks that you won't regret spending.