Why? Because these are research grants for companies doing research of any kind or developing new products, regardless of the type of output[1]. Their objective is to help companies grow through this kind of project-oriented funding, their are not investing in a specific product for... I don't know, the common good. But sure, opensource grants would be a nice thing too.

European HNers with an established company, you should look into this, getting a grant is not as hard as it seems and there are companies that can help you prepare your proposal (even for free, check you local government programs)

[1] https://en.wikipedia.org/wiki/Framework_Programmes_for_Resea...