A CVS store in Washington D.C. is seen in Oct. 2023 footage with bare shelves after a group of teens ransacked the pharmacy chain. (WTTG-TV) About 85% of Americans live within five miles of a CVS Pharmacy, so chances are good that you have visited one before. But you might not know all the details of the CVS loyalty program. It has two tiers of membership: ExtraCare, which is free, and…