Tripleclicks Gift Cards are indeed great marketing tools so it would matter whom I give them to.
First, I would consider giving the cards to my family members that transact businesses online to create a kind of curiosity that will ultimately push them to check up the site and maybe become interested.
I would then give to my friends whom I know have passion for online business,giving them the opportunity to look up the best online business ever compared to what they've been used to.