Aren't most Show HN's plugs to whatever they're presenting?
How it was decided which vendor is an alternative, what were the criteria etc
How can this be kept up to date?
Can I submit missing data, if so how?
This isn't unique at all, so what sets this one apart from the others?
I would've still put it in the submission itself but that makes sense
[vouch] for comment, if you have that option, it got caught in the noob green comment auto-flag filter (that is easily triggered).
EDIT: now undead.