Who said that? There is no source telling that you need at least 1000+ subscribes to get YT rank.
This is Pika-Network not Hypixel or any others server. Normally, on Hypixel, YT rank requires at least 30.000+ Subscribes. Okay, that a big premium server so i am not going in detailed. What about cracked server? Like Jartex-Network? YT rank on Jartex-Network requires about 750 or more subscribes. Also YT on Jartex required an active channel (2 videos/week) and keep an average of 100 views per video.