anything more than 4 means your ad display is getting wasted. the way a jet works is burning fuel in that rush in of air. if i haven’t experienced the solution yet, i’m still learning the steps for myself. so if you don’t have the money to make it right for everyone you either need more money or you need to get on a different track. in other words, the approach and strategy you adopt will be different depending on your circumstances and what you're looking to achieve. a few burnt very poorly but overall i liked them. 