Actually Gree don't sit there and ponder... Hmm how do we get campers to level up? They think hmm how can we make better revenue... You boys live in a weird world of make believe to think what you think... And it's not the world of KA.
Anyway stat jumps are in line with what they did on MW and that generate substantial spending. Before that in MW an KA real spenders had the issue of very little benefit of spending... So what if you get a unit less powerful than a dragon that can't die? As soon as you have dragons those units are a waste of money. LTQs give even free players a random factor based on how far they can get in the LTQ for free that makes the boring outcome of 1million free players all with 1500 dragons and banneret plates/hawkslayer Ar/ Mail crushers and Heavy battle axes. These items and PVE drops make for a variable outcome. Also it's nice to see that when you do spend some real money you can actually see a difference that is worth spending it on.
My old Kiss of Death account for example I spent about $2000 on gems and had minimal stat increases... Just ask Dr Bronson (Bronson) who now plays that account and he now has dragons which make hundreds of the units I bought defunct. so yay to gree for making real money worth it if you want to spend it.
Oh here comes all the free player whinging... Shush little ones.. You can improve your stats too by getting involve in the fun events, without spending!
I have a true camping account to and after 3 months its still level 10 (only ups because if attackers who lose) and its soooooo boooorrrriiiiinnnnggg.... But I have to do it so I can understand this mind numbing camping bit... Don't think I wasn't tempted to do the events but I restrained to stay low level and see if I can personally get every building to level 10 I can build as I slowly level to unlock the next lot. Phew... Time to pay attention to the traffic