Yeah but the IronSource Addon from this guy is 160$, only worth it if my game becomes a great success. If you earn „only“ a couple hundred bucks per month from advertising mediation does not really get you higher ecpm, because other networks often value customers with larger audiences. At least thats what I‘ve heard.
It is true, but you also get alot of other plugins from Chadori, which are amazing.
But you can also try to make your own plugin using instructions from ironsource documentation.
But i get your point, i am not sure if there is a cheaper addon out there.