I know everyone wants to rush to get out articles about this game while it's still in the public consciousness, but this was a little premature if they only have Day-1, Day-2, and Day-3 retention metrics.
While those numbers are insanely highly and the kind of thing most new mobile games would dream of seeing, Day-7 retention is a much better indication of what your longterm churn is gonna look like than Day-1 or Day-3 end of being. For comparison, most games lose 70+% of their players by day 3.
The real thing to me, and perhaps this is purely due to the sheer mass of DAU they have, but that ARPDAU isn't exactly impressive. Sure, it's good when measured against puzzle games, but most popular RPG style games have a much higher ARPDAU. The last game I worked on ranged from $0.50-$1.00 at different periods in the game's lifespan.
I'd love to see more metrics on this game. Their conversion rate I imagine is pretty high, but knowing ARPPU on top of that will tell us a lot in terms of predicting how well this thing is gonna do in the long run.