Well, "native exporter" means two things, imho:
1. It creates native app instead of creating container with portable brower and HTML5-game in it (NW.js and Intel XDK create such container, that's why apps are not as fast as they could be)
2. It is not a third party product, because only Scirra can make it work perfect.
I understand that it is very very hard to create native exporter - it's like creating another construct, but you can sell such exporters for extra money.
I have C2 personal license, but I am ready to buy native exporters for extra money with pleasure. And I am not the only one, who wants native exporters and who is ready to pay for that extra money.