>Release a mainline game that is objectively a disaster, loses 2/3rd of the fanbase and is hated by most of those who did play it
>Instead of doing damage control and teasing that you were already working on a new game (even if you weren't you could have lied), leave them totally in the dark and state nothing
>Destroy the mainline community in less than a year as a result, series basically ceases to exist in the public consciousness despite previously being popular to have easter egg references in TV shows

>Have a highly profitable, low cost, low effort gacha that has made you over a billion dollars just printing pngs of characters people like
>Be so petty and spiteful that you spam the gacha with content from the game nobody liked to try and force them to like it
>Realise nobody rolls for it and so try to force them to through ever increasing powercreep until you're releasing GHBs for it that are better units than 95% of 5* premium units
>Shockingly, people abandon the gacha because they don't want this content and have no reason to play if the majority of content is like this
>Realise this is happening so send out feedback surveys asking why everybody is leaving, promise content for your most popular game, even email people announcing the popular game is getting a banner so please please please come back
>Stab your fans in the back again, triple down, release 16 units for the series-killing game in less than half a year, release nothing for the popular game you promised to make more content for, see nobody is rolling, go even further with powercreep slop characters, destroy your game beyond repair

"IS" stands for Idiotic and Spiteful, they killed their IP rather than admitting to themselves that they made a bad game their fanbase didn't like.