That... makes a lot of sense. I see now. So the Jewel/Premium gacha has in BIG BOLD LETTERS that I totally didn't realize were still there haha the words 'New Characters More Likely to Appear'. *Facepalm*
On a related note then, is there a set release schedule? Has it been mirroring the DMM schedule? Should I just google-translate the JP Wiki? I know you're a water player for example, how did you find out about your 2 upcoming himes?