Just saying about myself: I want the results from my Threads blog immediately - zero patience, and constant changing names, concepts, languages...

On Reddit, I patiently posted daily for 3 months (95% posts were mine) before my sub reached 1K - Reddit wanted proof I was serious - consistency during a significant period of time.

It might be that Threads wants the same.

However, if you choose the wrong idea for a subreddit, you will never succeed. To understand how good your subreddit idea is, you should look at the first 2-3 weeks growth - if it's like 10-20 members only, you chose a bad topic (not popular or unclear) or named your subreddit badly.

So I see the parallel with Reddit: you should choose a good niche on Threads and look at the follower count - if it grows, just keep posting.

A good idea to check your followers' accounts - are they real people at all?