Birth Control and Folate?

I was watching TV the other day, and I saw a commercial for a new birth control pill that contains folate.  Folate, as they correctly state, is to help prevent certain birth defects that can happen early in pregnancy.

Hmm.

Does it strike anyone else as odd that a BIRTH CONTROL pill would include something to make your PREGNANCY healthier?  It feels to me like a used car salesman who includes a free bus pass with every car sale (umm... if the car works, then you shouldn't need a bus pass).  If the pill works, you shouldn't need the folate because you shouldn't be pregnant.

I get that the company is just trying to do something to make their product stand out, but why couldn't they include something that helps you with every day life (calcium, viatmin D, etc...) instead of something to help with pregnancy?