i was curious about the post timer so i checked it after every couple posts, these are my findings
stage 1 ~ 5 min (300 sec) ~ 0 to 43 posts ~ 0 to ⅓ stars
stage 2 ~ 2 min (120 sec) ~ 43 to 55 posts ~ ⅓ to ⅔ stars
stage 3 ~ 1 min (60 sec) ~ 55 to 104 posts ~ ⅔ to 1⅓ stars
stage 4 ~ 30 sec ~ 104+ posts ~ 1⅓ stars and above
according to other threads, 30 seconds is the minimum post timer, meaning you max out after approximately 104 posts
another thing i found strange is that the other 2⅔ stars do essentially nothing
Discord