You weren't blacklisted. The site owner was blacklisted because use like this is against the github TOS
This isn't actually hosted on github - it's a 3rd party service.
Poe's law is in action here, so I am not sure if you're serious. In case you are, you were not blacklisted for abuse, but the service you were using (the JSON editor) was blacklisted for abuse by the service that was hosting it (rawgit.com)