An API call is not a browser session
Reddit's anti-abuse stack treats traffic from cloud IPs differently from traffic from a real residential connection. An API bot — even a clever one — calls from a shared cloud IP, with no Chromium fingerprint, no cookies, no mouse movement. The RedditMaster Agent runs a real Chromium on your own machine, from your own home IP, with a real cookie jar and a real session. To Reddit's signals, it looks like you.