I love the spreadsheet and in depth analysis. Just to be 100% fair, she will have some expenses for the postcards she does send out (we have seen her followers mention them occasionally, so I believe she does occasionally send something out, though clearly not at the level promised). On the profits (patreon income - expenses for print, stamps, etc.) she will be taxed. So she's not going to have a pure profit of £20,000, but regardless, it's nuts that she has anywhere near this and keeps claiming poverty.