My initial response was: "what a shitty reward". I'm not sure people will want to take found items someplace in exchange for a couple of labels they'll probably not use.

Why not have the person who lost the item be able to offer an additional reward?

Why wouldn't I just stick my address / phone number on my stuff?

I'm not sure how they compare, but I know I've seen StuffBak labels in stores for years - essentially the same concept.