This feels like sucha newbie question but I didnt really have this issue before. Shopping campaigns- I have a store with 1 type of product but many variations. tshirt with different prints and colors. Title + description is optimized and keyword rich Bidding is maximized clicks with 3 campaigns where campaign 1 filters out any searches not including the word t-shirt, tshirt etc. so campaign 2 should still get pretty generic hits. max CPC is high. problem: budget ($35/day) is never even near used up? Ive raised the cpc pretty high ($5) just to try it. But still budget is not being used up. I have almost 100 different tshirts in this store. Bidding is no longer in learning and 3 weeks has passed. What would be the reason?