d3vilsadvocate: Frankly, if I wanted to use steam I would just do so.
Crappy manga games like HATOFUL BOYFRIEND are all over steam. And not only that... when you hit the steam mainpage you're greated with a pile of shit first before you manage to get to the goodies. Nothing against indie games, but the amount of bullcrap on steam every day is one of the main reasons I'm not using their services anymore.
Will GoG share the same future if it gets more successful?
While quality assurance is indeed an important issue, one that has plagued Steam in particular, I don't think GOG is even close to suffering from that problem (or at least nowhere near to that extent). While I want and expect GOG to curate their store, I also think that their restrictions should be relatively lax. As long as a game is relatively solid from a technical standpoint and is fit for purpose, it should be allowed on the service. And while I certainly don't want to see GOG replicate Steam's avalanche of releases, I don't think having more releases per week is a problem as long as every game gets at least some spotlight on the front page.
Plus, any store benefits from offering a large variety of products and the selection of Japanese games on GOG is nowhere near overwhelming. In fact, the struggle for DRM-free releases is even more of an uphill battle when it comes to Japanese games, since Japanese publishers are even more conservative than their Western counterparts in that regard. Frankly, it is primarily thanks to Western publishers (though this isn't to say that non-Western publishers don't deserve any credit!) that GOG has experienced a minor renaissance in terms of DRM-free Japanese games.
This isn't to say GOG hasn't allowed some rather poor quality titles on the service. But honestly, as long as GOG doesn't have such "
gems" as Air Control, Revelations 2012, Day One: Garry's Incident, Guise of the Wolf, The Slaughtering Grounds and The War Z/Infestation: Survival Stories, I think it's safe to say that GOG still maintains some standards.