Haha, I get what you're saying about the impulse purchase bait; most of the Nutaku Gold ones seem to be like that. That being said, is the 5x bonus actively announced, or is it just passive whenever a new kamihime comes out? Using recent examples (and current) as of just a few minutes ago, they're now advertising a "Dark & Light" pack. It is different from the other stuff as it ONLY contains 5 or so SSRs, and only of the L&D variety. This is one of those promotional ones you mentioned I'm assuming.
But I was just starting when Crom Cruach was around, and I recall Aphrodite being introduced into the Gacha pool at that time. Water drops were increased, just like fire drops were increased before the 12th when the Quetzalcoatl event started. Also, Svarog was introduced.
So my question is about that - they were released for events (or at least using events as an excuse). Did they have a 5x chance? And if so, was that 5x chance separate from the 'fire eidolon and kamihime chance increased' that they were talking about. As you mentioned above that the 5x bonus rate wasn't across the board, but those elements WERE across the board....
Anyway, I'm confused haha.
TL;DR Is the 5x bonus advertised or just passively built in whenever a new hime is released?