In some cases it wasn't possible to unlock the 1% achievement. This problem is solved now.
If you had this problem and your "earned Money" stat got stuck, it should now trigger the achievement once you reach the 1 million $.
Patch 1.12.1
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 2451559 · public branch
Steam updated · First observed