User blog comment:Luther Max/What will happen to Dokkan without new Characters?/@comment-25605814-20170208015554

In fact, there are MANY cellphone games which did not survive more than a year, I used to play MGSS on cell, it didn't even covered all the characters in that game before it ends it's service, so usually run out opf chars is not a big issue, run out of users is.

And just look at dragonball fusion.