Student or Learner
The following is from ad:
To celebrate their new site, M&S is offering Times readers two-for-one on all cards.
What does the underlined part mean?
Does it mean that if I buy two cards, I only pay the price of one card?
Or does it mean that if I pay two cards, I can get a third free card?
Thanks for your help
A bit of vocab: this sort of offer is sometimes caled, informally, 'a BOGOF' ('Buy One Get One Free'.)