Although I have been using repl.it for a few months now, I only recently checked out their community pages on repl.it talk. And this is something that I have observed myself.
Apart from this, I have also noticed how an extremely large majority of the posts on the share board are about people building some game. Is there some correlation? Nevertheless, I think repl.it talk could be a lot more interesting if there was more diversity in the projects that people are sharing.