Some limited-time modes in Fortnite are successful and some aren’t, but the Playground mode was notable in that its issues had nothing to do with player reception. The mode had to be turned off and then re-implemented because it was causing some pretty severe issues. What happened? Well, the latest post-mortem breakdown from the developers explains that it wasn’t an issue with any part of the game itself but a simple limitation of the matchmaking servers.
As Playground matches take place with far fewer players than a normal Fortnite match, the matchmaking servers were already doing far more work to match players up. That meant increasing the number of servers used by fifteen times… which meant also having to deal with a 15x increase in load and matchmaking lists. The good news is that the stresses of the mode have taught the developers where the matchmaking weaknesses lie, so future problems of a similar nature can hopefully be avoided.