Justoverclock As I said, if you use some javascript ad service like Google Adsense, there is usually some bugs that I could not figure out. The add should show up if you refresh the page (which is good because it will still show up for people coming from google) but if you are navigating through the forum I found out that it is not always showing up correctly. I tried many ways but I could not figure out why. This is a complicated interaction between how Google Adsense places adds and how Flarum works as a Single Page App (SPA).
I just wanted to bring the extension as it was and maybe develop a few more things but this is not my area of expertise so I am open to suggestions to make Adsense more compatible!
[deleted] Is it possible to add with markdown like something [ad no=1][ad]
This can be an interesting idea, let me think about how I can implement this. On the other side, it can be done with a custom BBCode, you can look at how other extensions may help you to do that if you don't want to wait.