The "trendy stack" comment seems misplaced. CS is famously written in Ruby on Rails, not PHP, perhaps one of the most "trendy" stacks at the time[0]. Coincidentally, CS is also awfully slow with frequent errors. Managing all my guests when my city was in high season was usually much easier to do via WhatsApp.

To be honest, as a top host in my city, the only features that Couchsurfing was actually good for was discovery. Everything else was kinda broken or slow. It added to the charm, but it definitely wasn't much better than what you're claiming here for Couchers.

[0] - https://about.couchsurfing.com/about/jobs/rails.html