Do new members post in their first 24 hours?
Whether somebody posts once on their first day predicts almost everything downstream. A member who lurks through week one rarely comes back in month two.
Take your last 20 joins. Count how many ever posted anything. If it is under a quarter, your problem is onboarding, not content.
Nobody built the room. No creator programme, no community push, and a first trailer that landed roughly two months before release. So there was no first-day ratio to measure, because there were barely any first days. You cannot activate members you never recruited, and by launch day it is far too late to start. Servers off in 14 days, Firewalk closed, 174 jobs.
Ghost Ship's developers answer in the server as routine, not as a campaign. A new member who posts once and gets a reply from an actual developer has a reason to post twice. That is what builds a first-day ratio, and it costs attention rather than money.
The decisionIf the ratio is low, fix onboarding before you spend anything on acquiring new members. Give them a reason to say something in their first few minutes, and check whether your welcome invites a reply or just talks at them.