I know how to use channels, but am I doing it the best way possible? For example, if I have one mini site that generates $5/day and has 2 different ad placements on every page (and there are 5 different pages) should I have one channel per ad placement per page? i.e. samplesite_mainblock_page2, samplesite_mainblock_page4, etc. ? How specific do you make your channels? Do you track pages or just ad placements/blocks?