Is there a strategy to reduce CPC in the campaigns and still get orders?

Is there a strategy to reduce CPC in the campaigns and still get orders?

CPC is reduced over time. If the keywords are deemed relevant and highly converting, Amazon rewards us and in return may charge a lower average CPC.
CPC also has to do with the market, if sellers are bidding higher for a particular keyword and the competition is higher, the CPC will usually be higher.