Small numbers.
That means, results are unpredictable. I do not know where the turning point is, but anything that goes on below 100 followers is probably below that turning point. And stuff that is going on above 1000 followers might be in the territory of statistics.
Also, viral fame. Like you might see a youtube channel with 1000 subscribers that has one video with a million views. It happens. With lower numbers even more.
And to be snarky, just because several people worked for days (gasp) on a project, that does not mean it is interesting. Even if it were a good project, it still needs to find it's audience. Without promotion that is even more random.