It's actually not okay and the HN system is designed to stop that behaviour. Looking at the submissions this appears subverted through various subdomains and TLDs, but its the same submission.
I'm okay with posting a few times, but 20 times? Come on..
Also, it will show up on the https://news.ycombinator.com/show for days, so if you miss it, it's because you're not checking there.
When I first started, I used a Japanese-inspired domain name but none of my western users can relate to it, so I changed it. At that time, the product was different than it is now, it was more of a startup community group to showcase their startups on a profile page rather than a landing page builder. That didn't work out. However, some users liked the profile pages I created for them on that website so I changed the domain name to oneprofile.info, a personal page builder (which is active and is used by over 2000 people).
After I launched on Product Hunt, some users requested profile pages for their side-projects and teams. So, I bought the oneprofile.team domain and used it for a while. Then, I realized restricting it to team doesn't make sense and thought of opting for a domain name that is much general. Finally, I ended up with the oneprofile.page domain name which is what it is today.
It was a long and arduous 9 months journey for me, a solo dev/entrepreneur. I don't have a strong voice on the internet so I had to do something like this where I keep posting stuff to get the word out and hope I get lucky and noticed. I really didn't mean to offend you or the community.
Accounts that only ever submit from one domain (presumably their own) and have no comments on any other threads (I don't know if you do or not; I'm speaking in the abstract here) are receiving a lot from the community and providing little.
The very same posting frequency is fine with me, if you're also sharing the thoughtful work of others that you find.
But the comments also show suggest that mine is the minority view, so.. carry on.
And because HN is an intelligent community, this post was deemed interesting enough, with the right offering and content, and IMO his behavior is reasonable
Along my journey, I managed to get to #1 product of the day on Product Hunt. When I first started, I was kinda clueless about where to start and how to get my product noticed. So, here's a free practical guide for anyone who needs some help in getting their product noticed in this hella competitive space of product making.
All the best!