I apologize. I won't make any excuses, I completely forgot the rule on what dictates a "round" and wrongfully thought time was involved (not that it's based on every single player posting)
Since you are upset, you can feel free to ignore my following advice (but here it is nonetheless).
It is a sad truth that sometimes rps, for whatever reason, randomly lose players (especially here on Iwaku). Also, every player is different and has a different idea of activity (some consider themselves an active rper, even if they only pop out one post every two or more weeks).
Because of this, it would be a good idea to set up a time limit. How long the time limit is should be based on your idea of activity. Should a player post once a day? Once a week? Some time in between? Setting a time limit will weed out people who can't meet those standards, and keep the rp going for your faithful players.
However, some leeway is important too (in case a player is having a personal issue or even is simply uninspired) Perhaps have a three strike rule? Miss three rounds without warning and a player gets the boot. (I would accept a strike since I didn't properly warn you ahead of time)
Those are just suggestions from a dummy who doesn't seem to possess proper brain cells to remember a simple rule.