Which part are you confused by?

I can't speak for the first two, but as for the softcore porn bit - there are a lot of very popular streamers who are just hot women that wear bathing suits or less and either do something mundane while looking hot or "exercise" or something that is also mostly just them looking hot. Maybe softcore porn is a bit much since there is no nudity, but it's close.

To add to this: Some other hot women are using 3D* microphones and they do nothing but moan into the mic (like if they were having sex or similar), and making "licking noises" and other similar stuff.

* Edit: no idea what are these called, but sometimes they moan and lick the left side, sometimes the right so you can hear it in your corresponding ear.

Stereo microphone is the term you're looking for.

* * *

It’s not even close to softcore porn. I can go to any beach and see the same thing, or a nudie sauna, and that is hardly sexual.

Hot is probably the right word. Well done if they make money from that I guess.

softcore porn is "softcore" because it doesn't involve nudity or explicit intercourse

the fact wearing a bikini at the beach is not sexual does not mean streaming yourself wearing a bikini in a hot tub while making moaning noises is not softcore porn. the intention is what matters eg attract teenage simp boys.

Traditionally I think the line with softcore was that it didn’t directly show penetration or fluids.

It seems like you're talking about something you've never seen. If you saw what I'm referring to outside of twitch, you'd immediately assume it was an onlyfans video or something. You can absolutely not see the same thing at a beach or a sauna, and if you did, the person would get kicked out.

I'm not commenting on whether it's good or bad, I'm just stating something that anyone who has ever been on twitch is well aware of and would never argue. It's a thing.

It's the difference between being at a beach with people in bathing suits and just doing normal beach stuff... and one of those people moving their beach towel and umbrella so that they're directly in front of you, while making hard eye contact, then proceeding to stretch suggestively, wink at you occasionally, moan from time to time, and "accidentally" drop things in front of you with bizarre frequency so they just "have to" keep bending over in such a way that you get a great view.

One's not sexual. The other one super-duper obviously is, to everyone involved, even if the bathing suit stays on.