Why does LinkedIn switch to an unspecific number after 500+ connections?

LinkedIn displays the number of connections has very prominently on a user's profile, in the top card on the page. As below, this user has 251 connections.

However, once a user has over 500 connections, it switches from a specific number to an unspecific number, and shows '500+' instead.

What are the benefits to the user, and/or to LinkedIn of not being specific of the number of connections a user has?