Numeric IDs are stable across platforms; a user who knows "ID 54591582" can search for that string in Google, DuckDuckGo, or other search engines and potentially find mirrors, backups, or related discussions of the same content.
On content aggregation sites, each video, image, or user profile is assigned a unique alphanumeric ID. Experienced users learn to as a way to bypass the platform's own search interface or to retrieve content that has been removed from its original location. Numeric IDs are stable across platforms; a user