Facebook is one, Slack (mentioned by someone else) is another, Yahoo Mail, Microsoft...
Does anyone know of a listing of these bots that attempt to preview links? From what I've seen, these bots tend to ignore robots.txt since they are not crawlers, so seemingly need to be handled one by one.
Does anyone know of a listing of these bots that attempt to preview links? From what I've seen, these bots tend to ignore robots.txt since they are not crawlers, so seemingly need to be handled one by one.