1. What is the criteria for a github copycat?
2. What is the process for having a website removed?
I ask #1 because many businesses use their own git-hosting solutions to host their code but also use github as a mirror. It would be very easy for a competitor to get the website of a rival business listed if the criteria is not strict and specific enough. I recommend never blocking the entire domain unless the website is a repeat offender (to avoid mistakenly harming innocent businesses and the liability that it may cause).
I ask #2 because many of these domains will likely be registered by honest people once the scammers are finished with them. There needs to be a way for the new owners to get their new domains delisted.