All links are publicly accessible, but it will limit you to 128kbps. I'm not aware of any way to rip the 320kbps streams, as the files seem to he protected.
Where do you want to buy it from? If it's some obscure shop that has its own encryption scheme, it may be hard to find any solutions. If it uses Adobe encryption, you can probably get away with using the DeDRM tools. Whether it's a PDF or EPUB, you should be able to extract the images. EPUB is easiest, since it's just a zip file, just like cbz. I've had de-DRMed EPUB files that I opened directly in a comic reader and they worked perfectly fine. The image file names were already sequential.
If it's some other scheme that hasn't been cracked yet, though, and you don't care about having the original files, I've had success using this method for automating screenshots. I think this is a great option if you just need "good enough" image quality to store something without DRM, as it will work on pretty much anything. And tbh, the image quality of digital comics isn't that great anyway.
People interested in piracy are also interested in ad blocking. Seems relevant to me.
Tencent also put the whole thing on YouTube for free with English subs. But of course YouTube audio maxes out at 128kbps stereo.
Similarly, ReelGood is another real good option. But there are many sites where you can track what you watch and get suggestions on what to watch next.
Why not change your system DNS to the public AdGuard address? Then you don't need to use the app. DNS filtering is still more limited than uBlock, of course, but if you refuse to use browsers where that's available, I think that's the next best option.
Use Jackett to search many free trackers at once. BTDig is also good, but as just a simple DHT search engine, it won't tell you the health of the torrent.