Due to recent promotions, my CTR has more than doubled. Will this anger the great google? Suggestions?
Don't worry - sometimes it happens. If you it is archieved in natural way (without encouraging to click on ads) then should be fine.
That works well as you are dealing with people who do click on ads. Google actually encourages promoting your site in this way.
Not usually that good to have a drastic increase in CTR, cause that most likely means a big increase in revenue, which may put your account under review.