Ok, at some point we made a big mistake.
Hacker News post about this: news.ycombinator.com/item?id=39309783 (source available)
There have been multiple accounts created with the sole purpose of posting advertisement posts or replies containing unsolicited advertising.
Accounts which solely post advertisements, or persistently post them may be terminated.
Hacker News post about this: news.ycombinator.com/item?id=39309783 (source available)