The owner of this client should just try to replace underlying Reddit with something else. Someone tried something similar years ago they bought up all the popular twitter clients
In Christian's case, if Reddit doesn't change their mind, his best bet is probably to eliminate the free tier, and increase the paid tier pricing. It's worth a shot, but Apollo would probably take such a hit it may no longer be viable as a business.
Ivory has been well-received, but who knows what the numbers are compared to Tweetbot. So this was not a "just swap the API" slam dunk.
Reddit's content isn't special. It's all network effects.
Yes, but they are strong and in place.
Reddit has a LOT of content and users.
Reddit, Tumblr, TikTok, Instagram, etc, all attract a similar type of user but they are different products that engage people in different types of social interactions.
You can't port that.