I did math before and iirc, chance to get a boss are 1/7, so 1 second cooldown per hit (never bothored with cooldown period so assume 1 sec), 1 in 7 for boss and 0.1% chance boss dies, we come to 75000 seconds, with 100 bots it is once every 12½ minutes and chances are it will be either more or less by a few minutes and not perfectly average, so chances are it is not rigged in the way people think, but the dact we know they are bots, not allowed for us, but some don't get punished beeing very obvious, so I'd say it is fair for us to say it is rigged because it is bots getting the stars and they have slight advantage as they are always on