Still I had this problem. If it’s resolved, my adsense revenue will increase alot. Recently we hits 600K pageviews, Discourse is just awesome but still the ads income is poor. 
Are these Pageviews Per day?
All time pageviews. Around 4 months page views.
If you don’t mind the asking, I don’t mind the answering 
For clarity, the pageviews of 600K are they analytics or adsense pagevciew metric?
What kind daily average for one or more: revenue, clicks, impressions or pageviews within adsense?
Yes but like most of Google UI/UX it’s incredibly unintuitive. I really don’t like their interfaces setup at all… but that’s another topic!
Auto ads > (click) NEW URL GROUP
Here you can specify specific URL’s and how the auto-ads appear or not! 
Ok cool, general stats are fine. Like week or month vs revenue.
Well anyhow. I had a look there at our stats for comparison.
April 12 (Pageview Stats)
22,325 - Discourse:
3,970 - G Analytics:
1,910 - Adsense
Never having forum pageviews from previous forum as we do with Discourse, not sure what to make of the massive difference between Discourse Vs Google/Adsense stats. Thus I can not draw no conclusions and only consider is:
A) Uh OH! Something is seriously not working!
B) This is normal, there is a technical explanation.
This is probably getting a bit off topic so to take it back. In my experience, auto-ads once you get them under control don’t always give a great return but it can help with keeping the total a little higher.
You have to observe how they appear. So far they are not so bad in Discourse. The mobile one are often the most invasion with full screen display, these can really annoy users. I generally turn these off.
Thanks for the insight. Can you clarify what is the duration covered for those stats, a week, a month, more/less?
All time i.e, 6 months.
Ok so your page RPM and Impression Rpm are very low. That doesn’t help but impression from our experience is key.
What I’ve found is our page RPM and impressions RPM has gone up since move to Discourse but the impressions have collapsed. Click are down a bit but not as much as impressions.
Red = Page Views
Yellow = Impressions
Pg RPM = Purple
Imp RPM = Blue
.
You can see the point where red/yellow hit the floor, and it hasn’t improved over time. It’s a big problem.
Perhaps we’ll try the other plugin but the only other option that we can see is to migrate to another platform.
You can see here, the Revenue pattern, Before / After Discourse, it’s not hard to tell.
Discourse is a great platform but if like many forums you rely on revenue to pay for maybe the cost to keep a labour of love alive, or actually make a living income from your online forum or website, then you should think very hard before you migrate to Discourse (or any platform for that matter!) until you have tested or are sure you are not going to see a 50-80% drop in your income.
We didn’t really come across this subject until too late, thus post this as a cautionary tale.
We don’t know what it is exactly that causes the problem yet, it’s been suggest it something to do with how discourse server up the pages, but nothing more specific than that!
Time has not solved it, even as user engagement and new signup is all trending in the right direction. Even if you loose 10-15% of your traffic it shouldn’t equate to 50-80% drop in revenue, should it? How then if so?
Yes there are also google whims but in this instance you can clear see the switch over point.
It’s night and day.
Just to focus on the impression point more, since we have the data from before and after, in simple number terms.
3 months Before switch = 2.2M (approx)
3 months Switched = 0.5M (approx)
The strange thing is Discourse gave us better mobile ad serving often where we had zero, and yet the impressions fell off the cliff! 
The question has to be asked:
*What causes Discourse to score such low impressions?
*adsense
How is AdSense measuring pageviews and impressions? Remember that Discourse is a single page app, so how does AdSense count a pageview? How do your ad placements and frequency of ads per page compare with what you’re showing in Discourse?
i think the problem is the Hot Reload, when a page is loaded you also load all the ads, but during surfing these ads are never reloaded, so you have 100 pageviews in Discourse but only 1 impression in Adsense.
Auto ADs のコードを表示させたいすべてのページに記述する必要があるとされている場合、Discourse のすべてのページに Auto ADs のコードを記述するにはどうすればよいでしょうか。
同様に重要な点は、Auto ADs のコードが 7859204789981798（実際のものではありません）という長さ（これは私の AdSense パブリッシャーコードと完全に同じです）であるということです。しかし、Discourse は 10 桁の AD コードを期待していると読んだことがあります。Auto ADs を機能させるためには、AdSense Auto ADs から提供されたこの 16 桁のコードを、どのように、どこで使用すればよいのでしょうか？
Discourse に AMP AdSense の広告コードを追加する方法はありますか？
次のトピックをクリックすると、広告が表示されないことがあります。Discourse は SPA であるため、広告を再度表示するにはウェブサイトをリフレッシュする必要があります。
ご提案をお願いします。
@Viki なぜ Discourse で AMP 広告を表示したいのか理解できません。説明していただけませんか？
通常の広告がブラウザをリフレッシュせずに次のトピックをクリックしたときに表示されないことがあるため、SPA に APM 広告は適しているでしょうか？
Google は10月に Auto Ads の何らかのアップデートをリリースしましたが、まだどのようなものかを示す優れたデモやスクリーンショットが提供されていないようです。また、リリースノートによると、コードは通常の AdSense 広告ユニット経由でも配信できるようになったとのことですが、これにより Discourse への統合はシームレスになったのでしょうか？
実際に本番環境で運用している方はいますか？ライブでの実装例をぜひ拝見したいです。