SamRock
Thank you for your plugin and article!) But you right, I also have a low fill rate in my games, unfortunately this is a problem for all developers who use Microsoft Ads. I hoped that with the appearance of interstitial banners and mediation something will change, but the fill rate is still bad.
It would be cool to use ads from Adduplex and video ads from Vungle they have a good fill rate and their SDK is recommended by Microsoft, but unfortunately they do not support winjs
I think in such conditions it makes sense to do only paid games without ads for Windows using Construct2.