If they cared about bots, there are several obvious currently active bot campaigns right now that are actively supported by subreddits' moderators. You just have to have the right audience that the wrong people want to influence and sit back.
Reddit only cares about bots when it doesn't result in them getting a piece of the action, or worse, where it drives their own action away. When it profits them, they support the bot problem with deliberate indifference, and this has always been their core philosophy even for things like child porn - until it became front page news, they had a LOT of underage nudity forums and massive amounts of activity in them.
There isn't really a profitable way to ethically run a social media site. You still need too many professional human moderators to control the bad actors who will endlessly abuse your forum if it has enough traffic that you'll lose money trying to 'do it right'.