There should be an improvement alert if there are not at least 2 active ads, receiving impressions, in each ad group.

Currently, if the ad rotation settings let Google optimise, and one ad is getting all the impressions and clicks but another is in the group with 0 impressions, Opteo won't throw up an alert, when clearly something needs to be done (as the 2 ads aren't rotating, and we should always be testing.)