We've recently dealt with bad actors who used free minutes to mine for cryptocurrency on the CloudBees platform, so we took action to stop the abuse by temporarily restricting workflow execution in the free tier. Read our blog post about this incident for more details.
We've made changes which enable users to activate workflow execution for the free tier by verifying their accounts. In the short-term this will require adding a payment method OR contacting us via Slack.
This is a temporary thing, and we’ll provide updates here as we work to resume normal service with the free tier. Please note that adding a credit card will NOT result in any charges to your account, though you may see a temporary charge or pre-authorization on your account.
We know having to add a credit card to an account introduces a point of friction to your experience. While completely eliminating misuse is impossible, we believe this solution will reduce the abuse.