pckrn
It might not be good for Nexon but the '5 ads for 40 crowns' might be Nexon's max threshold, the point where they're happy with the number of ads for the number of crowns. It's a good balance for them and us.
Personally, I think 5 ads for 80-100 crowns is a better balance but no doubt Nexon would disagree.
Davina's comments are spot on. I think they'll have a look at the results after a month or two and hopefully they'll keep the combinations that got the most views (because they generated the most revenue from advertisers) and scrap the ones that didn't.
Then perhaps they'll do variations on the ones they keep. At least, that's my hope.