For example, yesterday I tested an ad with 8 images. The best performing image had a decent CTR, but I paused it after 12 clicks since I had 0 conversions. Why did that happen? My audience was males, 16-19 y.o., single, who like World of Warcraft. I wanted to grab some attention using the title "The Successor of WOW?" and I promoted a browser game similar to WOW. What did I do wrong? Roughly, what CR should I expect from gaming offers?
P.S. I usually target between 100,000 and 200,000 people. Are these markets too broad?