I've been trying to read through the FAQ's, the wiki, etc. Lots of info & I'm still getting familiar with everything. If there's a good explanation on this, please direct me to the link. What's CPM and why do people get all excited about it? For example, say there's an offer to fly Airline X to SFO-DFW-SAP (and I guessing the return flight) for only 3.6 CPM. Is this something people consider primarily to earn miles towards status? Last winter I did Delta's transfer game and got miles for about a cent each and thought I did good.