> Otherwise you can probably extrapolate anything into a "subscription" service. Your bank and most credit cards are structured in a way that looks like a subscription, but an average consumer doesn't consider their plastic cards a financial "subscription".
I do, but I have to pay my bank X EUR a month to use it; therefore a paid subscription service. I don't have to pay Steam X EUR a month to use it. If I don't pay for Steam for a year, my account is still going to work exactly as it did before (sans a few DRM games, maybe, heh). Therefore, Steam is at the very least not a paid subscription service.
Whether it is a subscription service or not, well that is a different matter. I'd say a subscription service is only a subscription service if you regularly pay for the subscription (ie. monthly, quarterly, yearly). If the service stays running and working for you without you paying, then it isn't a subscription service. No, the reason Steam stays working is because of the <= 30% tax on all the sales. Which isn't a subscription service but more akin to a communal tax to keep the infrastructure working.
Apart from that, I never signed up for a Steam subscription. I did sign up for a World of Warcraft subscription. And that means there's no first sale doctrine, sadly, as this goes against the collector mindset the game stands on.