Sorry, I didn't want to move the discussion in that direction. The recent 'Show HN' of the page was a different user (I assume author, https://news.ycombinator.com/item?id=15758440). So I was wondering if the other account is a co-author/employee/second account of the same user because "hey, author here" comments often lead to good insight, e.g. features, comparison. Shameless plug is fine, it's a highly relevant service now that Google removed features.

It's fine as long as it's clear that the author is talking about his/her own creation.

OK, but developers should still disclose their affiliation.