Relay for Reddit app stays as one of the few remaining third party apps for Reddit and they are forced to go to a subscription model but the cost of such a subscription is related to how many API calls per user are done.
This screenshot was taken from the yet working patched Sync for Reddit app.
Reddit’s only allowing a handful of these apps to limp along for now to keep up the fiction that they didn’t kill 3rd-party apps altogether. These devs are doing all this work to eke out revenue models based on hypothetical costs that can change any time Reddit updates their APIs, changes API call pricing, or updates the site’s functionality. Reddit’s management was completely unrepentant about lying to and about 3rd-party devs just a couple of months ago, and all of the risk around underestimating API costs are on these devs. I hope that none of them get billed or sued into bankruptcy over this.