FWIW it seems fair to me: as long as the existing versions stay under GPL3, you're not stopping people from extending your utilities, you're charging for your i

FWIW it seems fair to me: as long as the existing versions stay under GPL3, you're not stopping people from extending your utilities, you're charging for your implementation of those particular features. Elastic [1] and Gitlab [2] both operate with a similar model of offering free, open source versions of their software with additional paid-for enterprise features. [1] https://www.elastic.co/blog/doubling-down-on-open https://www.elastic.co/blog/doubling-down-on-open [2] https://about.gitlab.com/install/ce-or-ee/ https://about.gitlab.com/install/ce-or-ee/