Why do subreddits have to have only one business model, that being free? Why is the only way to get corporate revenue ugly ads that no one wants to see? Why d

Why do subreddits have to have only one business model, that being free? Why is the only way to get corporate revenue ugly ads that no one wants to see? Why does a company like Republic Wireless maintain their own lame forum system that boils down to a heavily brain damaged psuedo-clone of Reddit? Why, for a fee paid by RW to /r/, can't /r/republicwireless exist with all of the mods on that subreddit being RW employees, or whoever RW employees select? I'd like that for customer support and product announcements and it would let RW focus on their core competency which is being in the MVNO business not the "running an internet web forum" business. There is a side issue, that I don't think a company that wants to be successful should take business advice from either a legacy newspaper in general, or specifically the NYT, which makes the whole thing comical. It would be like a telegram company demanding that an ISP make core business changes, because they're the experts, or at least they were back in 1890, LOL.