Honestly I asked few people who were previously posting on HN and they said that it's alright to do this like once a week if it didn't get much attention.

I haven't found anything about this in the rules so I decided it's okay. Before posting, I checked out that my link already disappeared in Show HN section.

If it's not okay, could you tell me is it at all acceptable to post a link twice? I saw really quite a few guys who did it. Sorry if I'm wrong.