I think they nailed it with the Outfoxed fate series. You have one fate that is a frequent spawn, gives 1 token and then you have a major rare spawn that gives a ton. Give players a choice, an option, a better way to spend their time and don't ask them to make compromises to work / life balance. This will solve the population issues that the servers are experiencing and encourage players to do the FATES.
The problems we are experiencing are game design issues that the servers just cant handle. The solution is to change the game to fit within the limitations of the server architecture.
