Do you know why is he writing about Google Reader now? Go to your HN homepage right now, as of writing this comment, the Google reader announcement has about 1700 upvotes. Ouch, that's a lot of views for someone to let go of. Hence, if someone writes something that compliments this announcement, common sense tells me that they would get more page views.
There's nothing wrong in having ads on your blog/website, people do it all the time. What's wrong is trying to create an impression to your readers that your sole intention is to write quality content, while you care just about pageviews. Please, realize that marco.org is no different from Techcrunch!
Marco isn't innocent, if you've been following him closely. Also, I think it would help if you take a look at this page where he just blatantly sells us, his readers like some piece of junk commodity.
On the off chance you're just stupid, here's some enlightenment. Marco Arment is a cofounder of hugely successful Tumblr and creator of Instapaper, both of which certainly make or made him more money than he'll ever make from ads on his blog, however popular. He's also created The Magazine, which probably makes a fair bit of cash already, and will be making more in the future. He has a solid reputation in the tech space, and it is stupid to argue that he's somehow spending his days trying to bait HN with empty crap articles.
marco.org is very different from TC, in that if marco.org had no ads, Marco would certainly still write to it, as it's his personal platform, whereas if TC had no ads, it would fold in a week.
The GP post should be nuked from orbit, but the reasoning you put there is hilariously specious. If it is so irrelevant, then why are they there? Why does Arment stuff entries full of credibility-diminishing "sponsored by" text, or worse insidious Amazon affiliate links?
Every ounce of reality says that he cares very much about his blog income, your imaginings of his external wealth notwithstanding.
Not putting a small ad on there that pays thousands of dollars would just be silly.
As a comparison, swombat.com has no ads because the amount of money attached to it would simply be too small to bother (tens of dollars a month at the very most, if that much). If it was a few thousand, I'd put a small ad on there even if I had millions in the bank.
Just because he says what we want to hear doesn't make the content wrong. I want to hear it and I want others to hear it too.
If what he is recommending isn't perfect, the comments here can expand and fix it.
Quickest example I could recall: https://twitter.com/marcoarment/status/176437401156194305
Coming from Marco Arment that is rich.
This is a pattern of hilariously biased perspective that he demonstrates time and time again, while occasionally trying to pretend that he's even keeled.
It is not terribly surprisingly that Arment shields himself from dissent, and tries to build a world where alternative opinions can only be wrong.
EDIT: Marco is funnelling his minions in here (because he totally doesn't read this place, am I right?), so expect moderation to reflect that.
In this case, you don't seem to have a critique of the content, the only area that the HN guidelines discuss. AFAICT, the content submitted is 1) original and 2) apparently quite relevant to the HN readership given the level of voted interest in this and other submissions related to the Google Reader shutdown.
So what ? Why accuse him right now, out of the blue ? And what does that have to do with the post ?
What exactly are you protesting against?
In 2011 in Marco's podcast he stated that 7" tablet devices don't make any sense, but then in 2012 he had changed his mind when the iPad mini was approaching its announcement. I am not calling him a liar, but just pointing out that opinions change and... opinions are just opinions.
I share his concern that each new feed reading service will use a different sync API, and am happy others will be reading this blog post. Regardless of whether Marco has jumped on the popular story bandwagon or not so he can make a few advertising dollars, this post is of value to enough people to up-vote it.
It's one thing to disagree with people, but to hate them and be a total jackass for no reason is just wasting your life on the internet. MANY web sites have sponsorship. MANY of them. Marco is no more of a sellout or in the business of selling you out than any of them.
What a tool.
Of course, being as above board as possible would still not be good enough for the anti-Marco brigade stomping around this pale imitation of what HN once was. I certainly wasn't here right from the beginning, so no hipster douchbaggery intended by any stretch, but I swear to those who have arrived more recently: You have no idea how good HN used to be compared to this. Sad, truly sad.
But yes, I like nostalgia too.