That’s slippery. Pay one mod, and no more mods will be willing to work for free anymore. The only reason a mod was seen as a volunteer position is because there was an overall informal agreement that the community collectively owned the subreddit, its activity and its content. Reddit just made it very clear that they think the corporation owns the content, and the users that produce the content in the subreddits. The facade is gone, pay one mod and Reddit unravels even faster.