From 2005 to 2011, the event was organized and sponsored by Nelkon and Mattel.
In 2013 and 2014, Mattel licensed [[Mind Sports International]] (MSI) to hold thean open
[[2013 SCRABBLE Champions Tournament|2013 World SCRABBLE Championship]]
in place of the traditionally invitational WSC.
In 2015, Mattel withdrew support for the SCRABBLE Champions Tournament, and[[WESPA]] has announced that they will be holding staged instead their first WESPA Championship, returning to the [[2015 WESPA Invitational Masters]] asa replacement event for invitational format. In 2016, MSI held the WSC in Perth“MSI World Championships”. In 2017, both MSI and Mattel staged events. In 2018, TMA International (formerly known as DB Subscriptions Ltd), Australiadoing business as Mindsports Academy, staged the “Mattel World Scrabble Championships”.
== [[2014 World SCRABBLE Championship|2014 SCRABBLE Champions Tournament]] ==