Doesn't say.

EDIT: Confirmed it is epub (bought it).

385 p

"Best Practices for Safe Asteroid Handling" by David W. Goodman feels like a smart, polished successor to golden age space opera, it's set in a future where the solar system is colonized, but not thousands of years out.

Grant Collier's "The Best Version of Yourself" is also not set very far into the future, but it's a kind of post-human future so it might have far-future vibes for you. This specific story is actually available free online, so you don't have to purchase the anthology to read it: https://clarkesworldmagazine.com/collier_07_24/

I pay a fixed rate up-front for reprint rights, which is a one-time deal. This is mostly because pro rata royalties on an anthology are a pain (I've done this before, it involves sending out lots of tiny single-digit-dollar checks), but also because it's unlikely for me to make back the money I spend on anthology creation (science fiction short stories are a tiny market).

This is a hobby project for me, I'm obsessed with trying to get more people to read science fiction short stories. I spent about $6k creating the anthology (to pay for cover art, reprint rights, proof prints, etc), and I'll probably recoup about half of what I spent? We'll see, I'm currently testing various marketing strategies.

Creating a World without adverts might be a route to utopia.