The government may not actively monitor transactions realtime, but it can sure as hell arrest a drug dealer or a sex worker and then go after everyone that has paid them money.
That's the thing about data collection: It may not be scary now, but it might be eventually. Who knows how a future government can abuse years of data (or data thieves for that matter)?
Add it to my "backlog" folder that I have a program that picks from whenever there's under 4 hours of playtime of my playlist. Once I'm through the old episodes I move it to the regular folder of podcasts that I subscribe to. I abuse Pocket Casts' internal webapp API for this.
(If it is current affairs, I'll subscribe while working on the backlog, so I both listen to the old episodes in order and get new episodes in the playlist).
Both cbr and cbz are just compressed archives - R for Rar and Z for Zip. The format has got nothing to do with how the images are displayed in a reader application.
If you want any reader to read a comic frame by frame instead of page by page, you'd have to uncompress the file, then cut out each individual frame and give them sensible names (eg. page_39_frame_03.png or somesuch) and then recompress.
Someone else in the thread mention software that can do this, but it might not always work as expected, when the layout is not straight-forward.
Go for it, it's just about to blow up.