Wait I thought reddit prohibits using personal API on third party client, that's one of main complain of the protest. Otherwise 3PA will still be running around just with asking each user for their API keys. Of course there are ways to circumvent that (cough, revanced, cough) but of course it's not official and your api key may suddenly be blocked.
This is my take with Social Media now as well, and cloud hosted LLMs.
I pay my own OpenAI API usage fee, which is less than the $20 for their official program.
I plan to pay Reddit via their API to use an open source client as well so I can consume the content (ad free) in the way I prefer.