Starting November 28th, 2022, free Heroku Dynos, free Heroku Postgres, and free Heroku Data for Redis® will no longer be available. If you have apps using any of these resources, you must upgrade to paid plans by this date to ensure your apps continue to run and to retain your data. Learn more https://blog.heroku.com/next-chapter
才被 salesforce 收购的。被资本收购都是这个结果吗