paul, 
Reddit is totally pulling a Twitter.
I'd say a Reddit client is at least technically possible, unlike Twitter, but pricing would have to be around $10/month which really reduces the # of users that would be willing to pay to where it may just not be financially viable.
https://old.reddit.com/r/apolloapp/comments/13ws4w3/had_a_call_with_reddit_to_discuss_pricing_bad/
