You're sugarcoating these numbers a bit calling them successful and describing signups as something that don't matter then exploring metrics that don't matter. It doesn't look like very effective marketing at all, maybe PH was ok but that's not very repeatable.
HN is a disaster, 0.5% conversion rate not 2.8%. At 3,100 visitors per per post you need 60 front page posts to get 1,000 registrations and probably several hundred to get 1,000 actual users!
TC looks really bad if you're pre-product, a mailing list is like a funnel on top of your registration funnel.
PH was a month ago so you can really pinpoint how effective that was - 705 registrations is some number of active users today.
HN is a disaster, 0.5% conversion rate not 2.8%. At 3,100 visitors per per post you need 60 front page posts to get 1,000 registrations and probably several hundred to get 1,000 actual users!
TC looks really bad if you're pre-product, a mailing list is like a funnel on top of your registration funnel.
PH was a month ago so you can really pinpoint how effective that was - 705 registrations is some number of active users today.