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Why is Google allowed to remove purchases from our Play Store accounts without telling us?
(www.androidpolice.com)
This is a most excellent place for technology news and articles.
You decided to use as an example the only company known to not overstep in this regard. Steam has historically refunded in full the cost of games that have been withdrawn. It's likely the agreements for these are part of the requirements of publishers rather than the platform itself, as well as the reasons to withdraw them.
That's absolutely correct, they're also excellent when it comes to lending games to other people. OTOH Valve is fighting its way through the whole European appeal chain to prevent having to allow customers to resell their games. They're going to lose, it's just a matter of time.