Opening image has a strong DALL-E/SD vibe to it (some parts are not easily identifiable). Oh wait, the caption indeed points to some generator.
Midjourney - founded by David Holz, co-founder of Leap Motion. Check out their discord :)
Yes, it uses Midjourney. Lots of hacks on Twitter using it and claiming they're "artists" because they can type DMs to a bot on Discord. It's trained on a pool of millions of unlicensed images.