Here are some Blockbuster rental codes to score free or BOGO free rentals:
Free Rentals:
use code: G2U13B4 (for 3/31 only)
use code: GY131 (good through 3/31)
BOGO Rentals:
use code: NEWMOON (good through 3/28)
use code: GN13B4 (good through 3/29)
use code: 555G13B (good through 3/31)
Check out a Blockbuster Express location near you.