They might be a good deal for donors, but there still are a lot of questions to ask.

By Kimberly Seville

But like that “What’s different in this picture?” game, there are important distinctions in the various offers.

Hidden renewal
The first National Wildlife Federation affinity card also promised “A FREE NWF Membership offered inside! after qualifying transaction(s).” Two months later, the free membership offer was gone and instead of “The most rewarding card of all^®,” it was “More Choices. More Flexibility.” It took me forever to find the mousetype to learn what I’d have to do to get the free membership — as a member already, I was curious.