Please understand that this is utterly useless to me, as I do not have a Steam account, and I will not install Steam's invasive, useless crapware on my computer.
This appears to be where I stop updating the game, buying new content, etc.
So basically, you're completely unfamiliar with the most basic functions, settings, and status of Steam. Since that's the only way you could possibly justify reacting like this.
Good to know.
If I had a time machine, I'd go back and chrono-abort every idiot who ever came up with the idea that customers should have to install download managers, spyware, and 3rd-party bloatware, just to purchase and use a software product.
A) Abortion joke, very tasteful and witty. Surely you have elevated the discussion.
B) It sure is a good thing that I've never had to install any bloatware or spyware on my computer to use Steam, or else, I might not actually like it!
To be clear, there WAS a time when Steam was little more than a resource hogging bit of unnecessary bloatware. It was from about 2004-2006. Valve got things together darn well after that, and personally, I think my computer can afford the 0.02% of its CPU and 300 meg of RAM (both values pulled from my resource monitor just now) in exchange for 75%+ off discounts on interesting games every week or so, the ability to use a chat client that's seamlessly integrated with my games, and organization of my digital game library. That's to say nothing of conveniences like a unified account for multiplayer games, instead of having a different login for each, the Steam workshop allowing easy access to user generated content for a number of games (most of the time...), and the (currently in beta) family sharing program which lets people on different computers play a game that's on your account, as long as you aren't currently playing it -- the full game, mind you, no restrictions. Also, cloud saving, which lets you save your game anywhere, and load and play the same game on any other computer that you login to your account on -- or, alternatively, just save to the cloud to not take up space on your hard drive.
Incidentally, fun fact: you can avoid ads entirely on Steam. It's the truth. Set your library as your home page (so that steam doesn't load to the storefront when you run it), and turn off "Notify me about additions to my games, or upcoming releases" in the settings bar. Both of those are easily accessed options, with no hoops to jump through.
...Mind, by choosing not to look at the storefront, you miss out on things like Mark of the Ninja for 80% off, but hey, it's your call. No ads.
Something to keep in mind before you call me a blinded Steam fanboy, a drone, or whatever new term it is you people are coming up with these days: Everything I have posted is a very easily verifiable fact, with a minimum of Googling. Heck, a minimum of Googling might even dispel your worries about privacy invasion...if you're not too paranoid to use Google because they might save your search history and sell it.