I posted the pic from discord where they discussed why RC was given.
Same for me, I logged in pretty much everyday for ... I dont even know how long, but I spent money mostly in my first months of the game and last time was I think the Black Friday sale and after that nothing.

So my theory of: anyone who spend the set amount of cash, but "not anymore for a while ", was treated as "having left" thus they tried to lure people back with this, nothing to do really with Logging in and such

I spend $2 a fortnight like clockwork on salt pulls, yeh it's not whale level, and the odd sale/gacha may get more thrown at it if I'm having a plush month

I got the 500 RC - I'm daily player and regular spending but not been a big ($10 or more) spend in a while, broke and 'meh' deals