It isn't simple typosquatting because it can involve errors that aren't plausible typos (like "mic2osoft.com" for "microsoft.com"), or domains that a user would

It isn't simple typosquatting because it can involve errors that aren't plausible typos (like "mic2osoft.com" for "microsoft.com"), or domains that a user would never enter manually (like "fbcdn.com" or "ytimg.com", which are used for content delivery at Facebook and YouTube, respectively).