Everyone on WGT has a different expiration date aka WGT retirement. For some it's when they've reach a certain Tier level. For others it's when they've become bored for whatever their reason. For others, it's when they've reach other points of not liking the game anymore for many other reasons. Sadly some players pass away, others physically issues make playing too hard (a bad shoulder, etc.), for some work and or family requirements change.
Some players don't like the site's changes, no changes or lack of improvements.
WGT came into our life and at some point it will go out of our life.
Death, taxes and not playing WGT.