[paxys]

They have to build and maintain the web version regardless. Why also write individual clients for Windows, Mac and Linux when they can simply wrap the website in a thin desktop wrapper and call it a day?

[mrweasel]

Because they care about the user experience and delivering the best possible product to their customers? Maybe not.

[Jare]

Based on their success, that's exactly what they are already doing, presumably thanks to the choices they are making.