How to measure a panel drop rate yourself in ten minutes

Nobody publishes drop rates, for obvious reasons. You can measure them yourself and it is less work than people assume. Pick one service from each supplier you use. Order the same quantity, to the same kind of target, on the same day. Write down the delivered count at 24 hours, day 7, and day 30. Three rows, three columns, one spreadsheet. Repeat once a quarter. What tends to come out of this: two services with identical names, identical refill labels and near identical rates behave completely differently, and the gap between them is bigger than the rate difference anyone was arguing about. We have seen the same nominal service hold 96 percent at thirty days on one panel and 61 percent on another. Nothing in either listing predicted it. If you have run this, post your numbers. Platform, geo, and the hold percentage at day 30. No need to name the panel if you would rather not, the spread itself is useful to everyone reading.