Create a report that gives you how many contacts were added, without filtering out unsubscibes
So, currently the "growth over time" report filters out unsubscribes instead of reporting what it says it is going to do, which is give you a report of how many contacts you added in a specific time period.
Nick Taylor commented
What's the update on this? Amazing that we have to do this type of calculation ourselves in Excel instead of just seeing it within your reports. All we want to know is how many *NEW* subscribers were collected during a given time period.. Many marketers care about this metric on it's own.. unsubscribes is another metric that is just as important and rightfully so has it's own report..
Richard Duvall commented
I currently do this manually. It isn't easy to keep up with though.