Yeah, you can't - but you're also not supposed to be snarky ;)

> Please don't use HN primarily for promotion. It's ok to post your own stuff part of the time, but the primary use of the site should be for curiosity.

That being said, usually repost happen with substantially new information, perhaps OP should post what's new or what warrants the repost.

Yes, there are plenty updates from my last submission. For example, we've supported 10+ more chatbos, refined the UI, supported more layout styles etc.

I thought that was probably the case. You're more familiar with the updates than anyone, so be sure to include that in the post - helps everyone!

Here's an example that's been reposted, but with updates. https://news.ycombinator.com/item?id=36788210

I'm daily user of ChatHub, author has updated a lot of new features in the past months. I think it's totally fine to share it again on HN.

And ten hours after the last comments, both you and the author post within twenty minutes of each other? How did you notice the thread? It is no longer on the HN front page.

it's on the show: hn page. I browse it time to time and look at posts with decent upvotes / things that look interesting to me.