I fully support companies having a monetization plan but I think the ads are a bit overboard. Normally I prefer to outright buy the game so as not to have to deal with ads but even when that isn't an option I am fine with ads within reason. So far I am seeing ads when I got to the castle builder, ads after every mission, ads at almost every screen save. This also wouldn't be so bad but I am also getting a lot of ads that are 30 seconds long videos. The extra use of bandwidth and the time I have to sit waiting before I can do anything else is a huge deterrent.
I know I can pay to get rid of ads but it's something I plan to wait until the game is fully released for. I think you might as well just charge for the game because these long wait times will either mean people pay to get rid of ads or people stop playing.