I'll let you know once we had actually hit some performance ceiling. Right now, there like 50 users. I don't even see that in my metrics. But I'll keep you posted.
Some numbers. When cursors.io (now dead, search images) had a huge influx from China for some time, it went into thousands daily. According to wiki, r/place attracted 90k, mostly bots, I guess. There isn’t much to retain a “player” in subj tbh, so…