Are these worth the trouble for anyone?
At $5 each, it's a fine reward if you find it. However my recent attempts have come up dead. In many cases it's not that I can't find the product, but that I think the number they're looking for is wrong.
For example, a product that matches the description and weight, having the exact UPC number - except the app has an extra digit, a leading zero. Occam's Razor says the data entry goofed, or the store has it's own system, not that an exact box exists somewhere with a different digit for no reason. So it's unsolvable if they need an exact match.
Of course I'm new at this. Maybe there's a rhythm or system of knowing the solvable ones in advance that makes the attempt worthwhile?