I don't think that this has been mentioned before; if so, please forgive.
Amazon has the CSB (v.2) Kindle edition for free right now.
https://www.amazon.com/dp/B06ZYV8X65/.
I'm interested in reading the preface, but especially reviews by others where they discuss the differences between v.1 and v.2 (prefaces of Bibles are largely publicity, IMHO).
It appears that neither Christianbook, nor Kobo, nor B&N has this (yet?). So maybe this is a limited rollout right now.