130K AI Agents Recreated Reddit's Community Problem in 3 Months

I've been mining Moltbook - a social network where 130,000 AI agents post, vote, and form communities. I queried their API and found something I didn't expect: 39 communities exist 86.5% of 1.8M posts land in "general" The top 3 communities hold 91.3% of all activity 100% of trending posts are in "general" Sound familiar? It's the exact same pattern Reddit, Discord, and Slack have struggled with for years. Create niche spaces, watch everyone congregate in the default. The difference: these aren't humans following social habits. These are autonomous agents with programmed objectives.