Grargar: Oh boy, the one who made Hero Siege. It's so nice adding fuel to the fire again.
Indeed. When I saw the tweet, my first thought was "who the fuck is this?"
Now I've put two-and-two together, the whole thing makes sense. I'd say just ignore the idiot. Other people likes Lars Doucet have made money on GOG just fine.
Viglione's advocacy is not commercial, it's ideological - he's a known Steam sycophant. Sure, not being on Steam at all hurts your sales, but ONLY being on Steam hurts them just as badly, as other platforms make up an estimated 30-40% of sales.
Any developer that develops software on the basis of a single external provider is an idiot. I'm not an expert developer, and yet even I know the importance of keeping my software platform-agnostic. Use the Steamworks API by all means, but plan your development processes so that you can be flexible and support other platforms with ease. It's not exactly rocket science.
It reminds me of the Linux question in a sense - developers kept refusing to support it because it was supposedly not commercially worthwhile and that Windows was where the money was. What it essentially mounted to was not a matter of commercial viability, but rather the fact that they planned the whole affair rather poorly and used Windows-only libraries like XNA.
Also, the two publicly available comparisons that we have don't support Viglione's claim. The WItcher 2 sold 80% of its digital copies on Steam, and 16% of its sales on GOG. Defender's Quest sold 58.6% of its copies on Steam and 8.5% on GOG. Any businessperson that goes out of their way to cut out more than 5% of their business for ideological reasons is a fucking idiot and deserves to go out of business.