Note that the asf infra is - at best - insufficient. Cassandra relied heavily on donated Jenkins worker VMs for all tests because the asf donated VMs couldn’t run the test suites. Recently we started moving tests to circleci... because it was better than waiting 24 hours for tests to run in Jenkins.
While Infra's suite of services is perfectly adequate for many projects, it's not uncommon for resource-intensive projects which strain Infra in one way or another to have to improvise. That's what I was alluding to with the build farm for Cordova -- don't quote me on this, but I believe it's provided by Adobe (and may even run on PhoneGap).
Things would probably be different if the ASF was a pay-to-play 501(c)(6) "business league" rather than a 501(c)(3) charity. Then the Foundation would have more funding at the price of having to answer to corporate masters.
But since ASF Infra must run lean, it is forever trying to find ways to do more with less -- and Github integration is an instance of that.
