I imagine they'd be eyeing things like having a partnership with patreon so patrons get access to an exclusive subreddit at a certain tier (with reddit getting some cut). Not saying patreon specifically would go for that but I imagine that type of monetization is what they'd be mostly considering. Or maybe a better example would be something in the realm of substack. Paying directly for access is hard to get people to go for without a third party with financial incentive to drive content.