Note that HashiCorp's CLA is non-exclusive

dosp-survey.ltx

@@ -456,6 +456,10 @@ checks whether the authors of pull requests have signed it, so that their
 contributions will not be incorporated into the codebase until and unless
 they do so. The company does continue to receive some outside code
 contributions to its BUSL-licensed projects, including Terraform.
+HashiCorp's CLA is ``non-exclusive"; an outside contributor could conceivably
+continue to contribute the same patches to a HashiCorp BUSL project and a
+non-HashiCorp fork of the same project, assuming that the codebases haven't
+diverged too far over time to make this practical.
 % TODO: Has the rate measurably decreased?
 % TODO: E.g. compare hashicorp vs. non-hashicorp addresses for contributions
 %       but note limitations of this method