The author of Ottoman punlished the first chapter on Twitter a couple days ago, and it blew up a bit:
As a result, the manga briefly shot up the rankings on Kindle, to as high as the Top 50 for all comics.
Last I checked, it was still around the triple digits in rankings. Time will tell how much of an impact this has on Shoseki. I imagine we won't see any results in full until Volume 2 hits, but this manga was on a rapid course to cancellation solely from the Day 1 shoseki rankings, so this may have saved it. It held a lot better than Zelos on Day 2, and I'm interested in seeing if it will increase with Day 3. In any case, we'll have to see.