It's more than enough to allow random befriending, I have around 80 friends, often relics from random befriending to join people for the usual reason to collect trophy's.
With the advent of sharing content though, this limit allows that content shared to potentially all of them, useful for popular gamers especially if this network allows other social integrations like facebook or to broadcast via YouTube or Twitch.
It can provide a starting block for serious or professional gamers the ability to monetize or plan to get rich.
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"When you begin to realize your own existence and break out of the social norm, then others know you have completely lost your mind." -PerfectlyDarkTails
AS 168/200, NT: 20/ 200, AQ=45 EQ=15, SQ=78, IQ=135