Well, I'm a whale and I never felt encouraged to spend on Aigis because it never had any special sales and there was nothing to tell me whether spending on the gacha would be worth it or not. If anything, spending on Aigis felt so... eerie because the game did nothing to really advertise it besides some really vague banners about what was available in it.

Kanpani Girls had gold mailboxes to encourage you to spam their gacha, Flower Knight has regular sales, and Armor Blitz rotates its sales every week. Aigis' gacha was kinda just... there. And I hear that in DMM, Aigis has regular sales too so they clearly KNOW they're supposed to have regular sales and special cash limited time events, yet... they didn't for the Nutaku version for some reason. Which baffles me and makes it feel like they wanted their game to die when they had the solution to get people to spend in the Japanese version and made no effort to try it here.

Still, lots of other people report spending on Aigis recently in this thread so I dunno.