We do this for a couple of reasons:
It's more fun to just give things away for free during this phase
We get a chance to test things more freely without too many constraints
HTML export will ALWAYS be free as long as we can support it
As soon as we release React export their will be a PRO paid version available
We are working on a Pro version of our free desktop Code App that will be exclusive to our (future) paying Pro plan users. No worries, the pricing will be very economic, we really want as many as possible to afford this. We understand you already are paying for Sketch and many other services.
That’s why HTML5 export will always be free and you pay zero dollares for the framework and our layout plugin. Again, we want as many as possible to be able to learn and use our design to code framework. The Pro plan will be for folks who really care a lot about getting this workflow to React.
We will not be able to sustain development of Sketch2React without some kind of revenue, specially since we do have some costs attached to this. We’ll update you guys when a plan is in place.
In the mean time: Happy makings!