This is the 16681st most frequent Korean word.
사은품으로
"사은품으로" means "as a free gift" or "as a promotional gift."
Here, '사은품으로' indicates that the mug was received as a complimentary item from a business' promotional effort.
사은품으로 받은 머그컵이 정말 마음에 들어요.
I really like the mug I received as a promotional gift.
In this sentence, '사은품으로' denotes that the book in question can be chosen as a promotional item offered for free.
사은품으로 책을 선택할 수 있어요.
You can choose a book as a complimentary gift.
In this sentence, '사은품으로' refers to the use of the gift specifically given as a token of gratitude towards the customers.