The old saying goes, "There ain't no such thing as a free lunch." Perhaps—I haven't checked every diner on the planet to verify that claim—but that doesn't mean you can't occasionally get something ...
If you've ever gotten a free sample from, say, Costco or Sephora, you know that a free sample can easily turn you into a regular buyer of a product. Sign-up bonus apps work the same way, and they have ...