YSK: Subscriber count on communities only show the numbers of users subscribed from your specific instance. The real number might be much larger than you think.
Really bends the idea of a comment "having" so many likes or whatever.
Reminds me of a talk Tom Scott gave once about being able to ban people in real life. He imagined an implant which distorted your perception and would just photoshop out someone in real time, you wouldn't hear them, you wouldn't see them, you would subconsciously step around them without noticing. Something entirely different could be taking place around you and you'd never know.