Please contact us, we have XL, XXL, Enterprise and custom plans for power users.
Every new account starts with a free trial of the Large plan, so you can try out everything we have to offer. After one month the plan will automatically downgrade to the Free plan.
Our 'Fair Use Policy' is based on averages. We don't really want to limit these features but if you have an exceptional app that stresses our resources (e.g. an app with large amounts of static data that we need to download from your repository for each build), then it's no longer 'fair use' and we'll contact you for a solution.
Every build consumes resources. If your app is so large or complex that a build takes a long time, you should upgrade to a medium plan, so the resources your app consumes are more in line with the price you pay for the service. That being said, 10 minutes is enough for 95% of the apps.