Hi Joe! I use Tubular (NewPipe) to follow you, so it's not counting as subscriber as it use the RSS feed (sorry), so my guess is that many Bitcoiners use the same or FreeTube, Invidious or just any RSS reader, which mean subscribers, especially for Bitcoin or privacy related channel, is certainly under estimated.

You have almost 2000 follers on Nostr, which also doesn't mean much depending on the relay used, but still it shows the strong community on Nostr, you should focus on here to grow your audience.