I just joined someones heroku app as a collaborator and all we need is 1000 hours a month. So he added his cc but now I cannot select a free dyno. If i turn on a dyno it says $7 rather than 0. How can I downgrade to free dynos again?
From Heroku documentation
Free dynos, which are available for personal apps, are not available to Teams. Create your own applications and use them for free, but cannot share this with anyone else.