MM:
You took the time to write the material on the gift cards and put it on your website for free use to the public (as did I). Doesn't it bother you that someone else essentially copied your work (with grammar and all) and is now selling it to people without paying you for your work, or even crediting you for it? Or am I mistaken here and he actually did pay you for your effort, as he says, but you don't mention?
Either way, does it bother you that people are paying someone else for the words you wrote and the organization of this information you created and intended to be free to the public? Does it bother you that he has added no information, insight, or even word organization of your work and is now selling almost exactly what you intend the public to have for free? It would sure bother me if anyone were to do that from my effort. It would make me furious.
I actually had one guy ask to to something very similar with my website. He wanted to start a similar one in Europe, and asked if he could just translate my stuff into German and put it on his site. I said no, but encouraged him to write his own information, using the links on my site to track down offers if he liked, but checking them out himself, and writing his own description and advice on them. I also encouraged him to indeed create a European site describing miles offers, with emphasis on those of European airlines, which I follow only sporadically. I told him I would be very interested in exchanging ideas, as I do with a few other website authors. But I expect him to do his own organizing and writing and his own due diligence on checking out the offers before he puts them on his website.