I was very active on reddit until around the 3rd meetup year or so. Thats when I noticed a major change in what had been an amalgamation of communities and while I still visited there was no urge to interact.
when you are in a smaller community, read: when you are around a manageable amount of people and even recognize some of them, you are more likely to interact. and your comment wont be buried, and its less likely some random asshole really hates what you said and makes sure you wont bother anymore. oh and less bots and chills whats not to love.