Because that's what it is. This is mainly about Activision pulling their plug, which directly holds it's link to it's CEO. The other known publishers also act the same, in the desire for all the money, rather than a slice, as deemed by Nvidia. It's become obvious over the years now with the whole self made storefront gig, and now self made sub game vault subs. I don't see why it would stop at streaming services, not when the other two are made evident that said companies want hardly any middle men that aren't going to pay them more (making the middle men with the worse off deal).
Blizzard has a lot of fine prints, but it fails to do a myriad of things (refunds being the most glaring of faults, that they should have been following to the code since day 1, hence why Australia is still wanting to take action, because Blizzard broke a code). The last thing I expect is a mere fine print holding them back from this.
We can talk all about law you and I, but they broke one before, and that's why they are in this mess with another country's government. Hell even EA is being sued in France for not complying with their laws, so you think a large company is going to always obey a little bit of fine print, when history has shown us that they break them whenever they feel like it?.
Sure, I don't deny any of that.
I just think that being paid to have their games on a cloud service is really all there is to it.