Yoshida admitted in a documentary that the game is designed such that you do not need to play every day in order to keep up. It is designed such that people can put the game down to go play other games and spend time with family. That it is fine if one unsubs and then waits till a content patch.

In fact, here is the part I am talking about, though its the third part of the documentary series.

https://youtu.be/ONT6fxiu9cw?t=12m54s

You will need to turn on closed captions, he says his thoughts in japanese.