Not having read the TOS of the platform (or even ever having used it), I'll hazard a guess this isn't quite legally true.
You are right in that there probably is a gotcha, you agreed clause in the text that is displayed after I have purchased the item. I also think the idea that is legally binding a farce.
Imagine how popular buying things would be if people actually had to read those agreements.
If you ever wondered why your elders are such sticks in the mud on this sort of thing, that is exactly why. Put a contract in front of most people and off they run for the hills.
This is why the click through EULA was the best thing to ever happen to the legal profession.
I mean, we're actually talking about "buying" games here. That's how insidious these things are. The few people who read this fine print will know that we're not really "buying" anything, we're being offered extremely limited licenses to the content. Can you blame consumers who fall prey to corporate deception? Marketing leads them to believe they're "buying" stuff. It's not really their fault when they become victims of corporate bullshit like remote content deletion. Nobody should have to consult lawyers before consuming.
Let's summarize all company contracts in an easy to understand manner:
1. We can do whatever we want.
2. You can do nothing we don't want.
3. We own everything.
4. We guarantee nothing.
5. You have no rights.
That does it. That's literally what all these little contracts boil down to. Every single time I read one it's just the above 5 points over and over in mind numbing legal language.
"Read the contract because it is likely a bad idea and you shouldn't do it."
Granted, in the car dealership scenario you have the opportunity to negotiate. That is not the case here.