Simplified, they're creating open source stuff HIVE will be able to use. The fact that people OTHER than HIVE people will also be able to use it doesn't negate the fact that HIVE people will be able to use it.
Their strat is to be blockchain agnostic or rather product agnostic since it's not dependent on being a blockchain and provide features that will help developers to create powerful applications faster by not having to reinvent the wheel for every feature.