I just worry that if we keep rewarding them, as they get bigger (and especially if they ever go public), they'll be able to strangle the market more and more because everyone loves them, and then when most of the serious competition has been squelched, they'll change strategies.
To be clear, I like Valve in their current state. Steam is great, the Tenfoot/SteamOS software is great at converting a PC into a game console, Linux gaming is arguably better than on Windows now, and all of this is in no small part due to funding and effort from Valve. I'm not naive to this, that's objectively cool stuff. I hope they continue to be the same company.
Epic's storefront is trash (only recently got ability to gift keys, still can't leave reviews), Microsoft already botched Game Pass by showing their cards too early via substantial price increases, and Amazon failed so badly that nobody even knew they tried.
I feel like this is a Normalcy bias though [1]. Valve hasn't abused their status yet, and maybe they never will, but all it takes is a change in management for that to come to an end. Even if there's no competition to squelch, they still might just decide they want more money and engage in rent-seeking behavior.
For example (and to be clear I am just making this up and it's not based on anything), suppose Valve were to start charging a yearly "hosting fee", where you now have to pay $50 a year to cover the cost of hosting your games, and if you don't pay this hosting fee you lose access to all your games. I have like 800 games on Steam, I've spent thousands of dollars on them throughout the years, I don't want to lose them, so I'd probably complain about it and take out my credit card and just pay it.
Stuff like this has already happened with other companies (like the Unity licensing fee fiasco a couple years ago).
I'm not saying that it will happen, but at this point Steam has so much of the market and so many people have their entire game collections on there that I don't think we should discount the possibility that it could happen.