To be honest you can get Cave Story for free already since it’s open source and in many distro repos. Also I think the publishers kinda ripped off the original creator so the guy who actually put the work making this masterpiece isn’t getting anything

FreshRSS is what I use and I can create my own feeds using X path, it’s kinda great but too much to explain. I wrote a blog about it.

https://joelchrono.xyz/blog/newsboat-queries-and-freshrss-scraping/

FreshRSS, news and websites fetched your way. You can even create feeds for websites that don’t provide one