I had been wondering about this, too. The ECU was to have been the simpler version, not the streaming version, purely as a cost item. However, if they're going to make back the difference on sales of Skyzmatic (and its competitors), the upgrade is likely to be profitable, and they may just quietly be doing it -- a couple of dollars in extra cost / unit offset by ?? in their share of Skyzmatic profits. (You don't imagine Elio doesn't make money on these "Factory Sponsored" options, do you?)
Another reason I think this may be the case (upgraded ECU) is that they're "in talks" with Navdy. If the data won't stream, they'd just have said a flat "no thanks" to Navdy.