That hella depends on the kind of tree. Just had a 9 meter hazelnut tree in my back yard cut down to about one meter. Not a leaf left on the thing. Couple months later and it’s already back to two meters with a lot of leaves on it. it’s expected to be back to about 6 meters next year.
Try that with e.g. an oak though and it’ll not go as well.
Measuring by units would be WAY more skewed. The top 10 would all be free items, or if you exclude those $0.01 items. Measuring gross revenue is much harder to game unless you count “actually selling $500 hardware a lot” as cheating somehow.