Sorry, no. This is not accurate either. According to Unity’s own FAQ regarding the subject… Which you can look at right here…
Do installs of the same game by the same user across multiple devices count as different installs? We treat different devices as different installs. We don’t want to track identity across different devices.
So, again, if I install the game on 3 different devices, Unity considers that 3 installs. If I build a new computer later, then reinstall the game there, it’ll count as a new install. The scary thing is… what if someone hates you as a developer? They now only need to buy your game once, then setup a script to roll VMs and install your game on VMs (each VM counts as a seperate device), and you, as the developer, will be hit with the new install cost each time.
Additionally…
Does the Unity Runtime Fee apply to pirated copies of games? We are happy to work with any developer who has been the victim of piracy so that they are not unfairly hurt by unwanted installs.
The issue here is… the developer would already have been charged the fee for a “pirated” install, because, how is a developer supposed to even know their game was pirated in the first place. Here, the developer may already be financially hit for a pirated game and now has to spend time and resources with Unity to convince them that some percentage of installs are pirated installs. Earlier in their FAQ, Unity claims they do not have a “phone home” when a Unity game is run, so, how are they determining installs in the first place? “Aggregate data”… or, another words, “trust us”.
To start with, you’re right. Digital distribution in general is volatile for consumers. While I will say that Steam, at present, is leagues better in that you must download the game purchase in order to play it (meaning, you have a direct copy of the game on your hard drive, which will remain there even if the game is removed from the Steam store), it is not outside the realm of possibility that this could change in the future.
That said, publishers having their own launchers, I’m sorry to say, has absolutely nothing to do with their fears over “the valve guy” retiring (his name is Gabe Newell, by the way), and significantly more to do with making more money. These publishers figure if they can get you, the consumer, to buy their games directly from them, they can make 100%+ of the money, instead of having to pay Steam a percentage for any transaction. Due to the limited scope of these Publisher-run launchers, purchasing a game from them is even more volatile than purchasing from Steam (at least in the current climate), in such that if the Publisher suddenly finds their launcher is not bringing in customers (which, on average, compared to the draw of Steam at present, they generally don’t) publishers could simply drop their launchers and the catalog of games you, the customer, may have purchased from that launcher would go with them… again, yes, this could happen if Steam went down, but presently, pound for pound, the publisher’s launchers are far more likely to fall than Steam will.
Also… for any of these services (Steam or publisher launchers), you have to download the game locally in order to run them. The games are not streaming as most movie and music content is. As such, once you install a game, you could crack them to remove any DRM attached to them (barring any game that’s strictly online), then, yeah, you can self-host/store these games yourself all you want. If you buy games from GOG they make this even easier for you.