The short answer: cost. A legitimate SparkoCam license costs around $49.95 for a standard license or $79.95 for the "Pro" version. While this is reasonable for professional streamers, hobbyists or students often seek cracked versions to avoid paying.
Both Canon and Nikon now offer their own free, official webcam utilities. If you own a compatible camera (e.g., Canon EOS Rebel series or Nikon D3000 series), you can use the manufacturer’s tool without any serial number or name activation.
Here’s a specific danger related to "SparkoCam serial number and name" crackers. Some keygens inject SQL or buffer overflow code into the "name" field. When the software validates the name, that code can execute and install a backdoor on your PC.
If you decide that SparkoCam is right for you, obtaining a legitimate license is straightforward: