Well considering Big Fish games was the common choice for the desktop games of the 2000s, alongside others like WildTangent and GameHouse. Steam has become the new choice of AAA modern gaming, but these sites came way before Steam was revolutionary.
Speaking of that, Enkord would have to go through Steam Greenlight (it mostly happens on new accounts) and have to pay fees for every new game posted on Steam. Some desktop games, like Wonderland Adventures, have yet to make way for Steam. It'd be harder to post something on Steam, and it might have a hard time being known out in the wilds of Steam.
Not that I don't think you know what you're talking about, but the Steam Greenlight program ended nearly four years ago. Now with Steam Direct, you simply pay them 100$ upfront and you can publish your game, of course you'd have to contend with Steam's infamous 30-70 revenue split, but I think it's worth it considering the many features Steam offers compared to Big Fish.