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/

📣 Had a call with Reddit to discuss pricing. Bad news for third-party apps, their announced pricing is close to Twitter's pricing, and Apollo would have to pay Reddit $20 million per year to keep running as-is.
Hey all, I'll cut to the chase: 50 million requests costs $12,000, a figure far more than I ever could have imagined. Apollo made 7 billion...
reddit“The enterprise tier is a privilege that we will extend to select partners based on a number of factors, including value added to redditors and communities, and it will go into effect on July 1.”
Thank you sir, may I have another.
https://old.reddit.com/r/redditdev/comments/13wsiks/api_update_enterprise_level_tier_for_large_scale/API Update: Enterprise Level Tier for Large Scale Applications
Posted in r/redditdev by u/FlyingLaserTurtle • 0 points and 30 comments
redditThe thing that bothers me most about this Reddit stuff is the Gaslighting. If you are going to kill off all clients, just own it. Don't lie and say you value 3rd party clients and then act like they should be thankful for your over priced, unsustainable access plans.
@paul It's insulting. A Reddit employee: “Apollo is calling the API at a rate of 345 events per daily active user, per day. Other major 3P apps are calling the API at a rate of 99 events per daily active user, per day. Apollo could reduce their cost by 3.5x if they were as efficient as these other 3P apps.”
https://old.reddit.com/r/modnews/comments/13wshdp/api_update_continued_access_to_our_api_for/jmddwnj/?context=3

API Update: Continued access to our API for moderators
Why are you assuming Apollo is just not used more than those other apps? If those other apps are using 3x less API calls, but are also being used...
reddit