Skyhook claimed that Google forced mobile-makers to stop using Skyhook if they wanted to keep using the Android OS
Correct me if I'm wrong, but isn't it the "Android" trademark and associated Google services (e.g. Play, Gmail, Maps etc...).
Small detail but important nonetheless - anyone can make use of the actual "Android OS". They just can't call it Android and offer Google Apps.
Not condoning their action if Skyhook's accusations are true but they are as yet unproven - and last I time I check Skyhook is free to compete against Google and all the other location apps on the Play store. They're also free to partner with anyone using (unbranded) Android.
Personally I'd rather their app was not installed by default on any device I own but that's just me - I like being able to choose my own apps on a vanilla platform.