It's an interesting methodology. Some thoughts: (1) 12 times is way too low for number of wears. I'm probably extreme, but I've got tech shirts that could apply for a drivers license; I've easily worn some of them hundreds of times -- let's say every other week for the last 500+ weeks. (The older shirts are too worn thin/ragged to wear in public any more though.) (2) I'm not sure CTR is going to be as high as an expl…
1. I totally agree. It is a variable and one that is in the spreadsheet.
2. I need to look into traditional CPM to understand how to calculate. I may revisit this post in the future using CPM as the calculation.