What do you do now? I’ve been buying physical books off of Abe Books—not a bad thing at all—but I’d like to use my jailbroken kindle again because the form factor is so convenient.

Buy DRM free when you can. Not only is this convenient for you but will hopefully help nudge the market. When you can't, buy the book from one of the easily cracked sources (Kobo, Google, Adobe DRM).

Or you can save yourself bother of removing DRM by buying the book from wherever and then downloading a copy from Anna's.

I try to buy physical books, and make an effort to buy it elsewhere, with AMZN being the reluctant last resort if I truly can’t find it. I don’t have a specific go to place anymore.

Also, I reduced the buying pace - owning physical books takes up space, so the bar for getting something into the library is now much higher than before.

Not the guy but you can just buy your ebooks from someplace else and use calibre to convert/send them to your kindle.

Im kinda cheeky and use Amazons Send-to-Kindle service to send ebooks in epub format to my kindle via wifi

If you already bought them, just download them off anna's archive.