I've spent a long time looking at alternatives, but Webflow is currently the best choice for building responsive sites. I want to see Webflow succeed, so I'm making this suggestion. Others will eventually catch up in terms of features, but if you grow a community, you will be here to stay.
Why not open up the templates section to outside submissions? Then offer a free month of Webflow for the authors of the most popular templates. A good community is more valuable than money.