First, Georgetown insurance is not compensation. These are students, not employees.
Second, the compensation that is offered is determined by the employer. Wether the employee wants to accept the offer is up to the employee. In the case of religious organizations, they offered as compensation insurance that specifically excludes birth control as contraception. The insured and the religious organization are saving money on insurance premiums. The people that accepted the job, accepted the compensation that excluded birth control pills used as contraception.
It's free birth control pill, in the sense of anything else in this country that is free. Prior to my wife having BC covered from her insurance, we were paying 50-60 (I can't recall which exactly) per month. Now, she gets it free through her insurance, since she is not paying at the point of picking up the pills. I know you realize this, but want to insist that since she's paying a small increased premium for the BC coverage, it's not really free. You are wrong. If we were to use your definition of free, we could get rid of the word, because nothing in this country is truly free.