Hmmm so the Mature section is more for erotica and the Mature filter is more for...what it currently is for, like suggestive situations and explicit language? I'm confused. I wish they had chosen a more distinctive name. So these stories in the Mature content tab aren't like the stories that have the Mature filter? They're more mature? I'm trying to figure out how this impacts currently mature-flagged work. I'm concerned that after already being hit by the Apple ban, now new readers looking for mature content will be led straight to the premium-only stories thanks to that nice new shiny Mature button up on top, and won't find their way to the mature-flagged content.
As Tapas is sort-of-kind-of like a publisher, it makes sense that this new Mature premium content would be carefully regulated. I totally understand that, but for mature content creators, this is always such a difficult hurdle, because if you don't fit into whatever narrow brand of "okay" mature content they have is, you're out of luck.
If you're a writer of mature content then I highly recommend publishing on smashwords, whose policy regarding mature content is very liberal compared to most sites.