Wikitree is designed to spread far and wide on the Internet. The “cousin bait” page https://www.wikitree.com/wiki/Help:Cousin_Bait
Suggests ways to improve the odds that other folks will find your Wikitree profiles on the Internet. Here is part of what that page says:
Unlike many genealogy sites, WikiTree does not restrict information so that only members can access it. The only restrictions on WikiTree are for privacy. This means that we maximize the amount of information linked from social networks and indexed by Google.
Google is where many genealogists start their searches. We work hard to make sure that WikiTree profiles are accessible to Google, and WikiTree members send signals to Google that profiles should be highly ranked in search results by sharing them on Twitter, "liking" them on Facebook, etc.