I've only spent about 80$ on this game, 50$ on the miracle ticket and a 30$ on a guaranteed SSR. I've been enjoying this game for almost a year. Video games these days rarely make it past a month before they get dull for a similar price, or more with all the DLC crap you get these days. You could say this game has been saving me money from not buying other games as I'm often too occupied with this game's weekly events.
In your opinion it is.
Kamihime will close eventually, there is no doubt about that. It's simply a matter of when. Hopefully not out of nowhere like Aigis was.