https://bugs.winehq.org/show_bug.cgi?id=43508
Austin English austinenglish@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |minor
--- Comment #11 from Austin English austinenglish@gmail.com --- https://filehippo.com/download_kindle-for-pc/1.20.1.47037.0/?ex=BB-2188.1
The sha256 matches from my original post.
With wine-7.6-100-gae9266992a5, I see the same (login never shows, terminal is infinite spam).
A newer installer (KindleForPC-installer-1.30.59056.exe) doesn't have this issue, in wine-7.6-100-gae9266992a5 or wine-6.0, so the kindle codebase must have changed at some point.
TL;DR: There's still a bug in wine, but it's no longer a problem for kindle users.