The submitter is promoting their site, so this shouldn’t have been vouched for. I agree with nkurz's assessment that the system is working as designed. Also, a

The submitter is promoting their site, so this shouldn’t have been vouched for. I agree with nkurz's assessment that the system is working as designed. Also, after it was vouched for, the submitter posted or requested comments from sockpuppet accounts – just like they’ve done in the past. The fake accounts and comments probably justify banning the domain. And to wanshao: this isn’t the place to try to promote your stuff, let alone with fake comments. Read https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html . The platform manipulation that worked for you the last time will not work again.