Way back in the day, when Steam used that ugly vaguely-military olive drab color, any free apps just showed up in everyone's accounts. There weren't that many - a few demos, all for Valve games. The entire Steam library was only like thirty or forty games at this point.
And then PopCap joined. They basically doubled the list of paid games, but also added demos for at least two dozen games (I recall the list was so long I actually had to scroll). People were understandably furious, because that made it a lot harder to pick out the games you had actually bought from the demos that just popped into everyone's accounts. I think this was before there was an option to show only installed games, which would have made things much worse.
Valve fixed that pretty damn quickly. And I thought everyone would have seen and learned from that. Sadly Apple refuses to learn from their own mistakes, let alone the mistakes of others.