Not at full capacity in normal, but in 2014, for the school trip, I went to Everland, but too crowded on weekdays. In opening time, ran to T Express, but 40-minute wait. After an hour, wait time:160 min. So I used special FastPass ticket for re-ride with recorded video of our ride with $15 per person and skipped 180 minutes line. Besides, other flats are 60~90 minute wait(pirate ship:100min. floorless topspin: 70min. Night Safari adventure:100min. Arrow looper:90min. ) So just ridden 9 rides ):
However in the minimal capacity, I visited Everland and had 20min wait on T Express, and no line on flats, total 1400 visitors on that day But normal Fastpass was sold out on T Express and had total 32 rides that day(including reride and T Express 8 time)