Hashicorp is one of the extreme examples. Terraform Cloud is an okay product at best, which went from expensive to very expensive. Moreover, they aggressively changed the Terraform license from open-source to BSL. So after the whole community contributed a lot of providers, they want to profit from that. You should use OpenTofu and buy IAC from one of the companies sponsoring full-time engineers on that project: Spac…
In all fairness, the Terraform provider registry has always been clearly proprietary, prohibiting commercial use by default: > You may download or copy the Content (and other items displayed on the Services for download) for personal non-commercial use only https://web.archive.org/web/20201106225027/https://registry....
Apparently a lot of the actual images are hosted on the GitHub container registry (ghcr.io), and in many cases, the Terraform registry is just passing the request through to download an image from a repo that may be owned by someone else.
So in effect, they're putting scary licensing text on a lot of content they have no control over.