if i tell my technique here, everyone will be doing it if i know you in game, i'll be happy to tell you how. but not here
People with multiple pc/laptop gear up 2 hermit12 chars. Target 2 different zombies then leave their char afk.
You can make way more from ccd. I can just share my technique: - Red Run doing full run with my nuker with abotu 550% drop rate I will get about 40m per 10min + 2 mins (selling). Now the most annoying part on red run is that you have to collect srs passes to actually make some extra money (around 10-15kk just from srs passes if you sell to npc). - Black run just complete 19 rounds and relog (from round 20 you will have mixed mobs with bosses or just bosses). I get full bags of weapons which means ~40kk => 12 mins to complete + 2 min per selling So doing a quick math i will make like 200m per hour. Honestly I prefer doing black runs just because I am lazy to collect srs passes from red run...
CCD running is not secret..... It's all about how fast you can run it as well as drop. You'll spend more time picking up drops than kill mobs. You can make 1.6b in a 8hr farm (on event or if you have enough drop off event).... The hardest thing is saying focus because boredom will set in! I've fallen asleep at the keyboard multiple time
I tend to advocate to my leaguemates for 30mins or 60mins runs and taking a break in bamboo after. Falling asleep at the keyboard is risky and may lead to unintended asdfg imprints on your left or right cheek when you wakeup.