If you define "good" as spreading knowledge and access to technology across all platforms, and "evil" as shutting down multi-platform technologies and restricting them to just one walled-garden ecosystem, then Apple is definitely "evil" in this instance.
In some cases like Google acquiring Sparrow, it's because the acquisition was really a case of hiring an entire team. In other cases, the shutdown is so the acquisition can focus their efforts on a new product. This is clearly the latter case.
I know that in some circles folks make Apple out to be some sort of evil. Be careful that your bias doesn't lead you to make claims that are unsupported by evidence.