Somebody asked them on twitter. The response isn't particularly reassuring. https://twitter.com/stevenf/status/204675630363721728

I don't do fron-end web design, and I wouldn't buy Coda even if it was 5 dollars (I have no use for it) - if I were to buy it, I would certainly email them and ask about it.

But I use several other Panic products and like them very much (Prompt for iPad is great for example). So it's not something that I actually care about in the slightest. I just wanted to warn my fellow HNers to consider these points before purchasing.