(I didn't downvote). For comparison, imagine you signed up with the username "Oracle" and posted "Fellow data storage sufferer here. I understand and share your pain. There isn't any magic pill yet but until someone invents it I can tell you I've found great comfort using the Oracle database" and a link to a "purchase Oracle" page.

You might be a well-meaning person, but you're hard to distinguish from a bot pushing a fad diet with online courses, a for-pay app, a shop, "find a dietician" services, certifications, etc. Preying on offering hope to the sick and desperate is common and people are cynical and wary of it, and even genuine well-meaning people are prone to sharing dubious alternative medicine suggestions which they honestly believe help but aren't proven to do anything more than the placebo effect. If you were a long-standing HN commentor, you'd probably get more benefit of the doubt; signing up as "fodmap" to link to an apparently for-profit fodmap service with an emotional message makes it easy to assume bad faith astroturfing at a glance - focused username, commercial link, fringe/alternative/woo treatment, claims of health cure for incurable condition, SEO style message ("As a fellow sufferer, believe me, I know, I've been there, trust me, just one easy credit card payment").

[I wrote this for your deleted comment;]