Sell what you make — keep how you make it

You've spent years building how you work. You don't want to give that away — but you do want to get paid for what it produces.

You sell the output, not the method. Publish weekly or monthly; subscribers get every update automatically. How you make it stays yours.

You can state your workload and your standards — “I mark 200 exam papers a month,” “a mistake goes in only after I've seen it three times” — without explaining how you analyse anything. Proof there's a tree; the seed stays yours.

You keep 90% — card processing (~6%) is deducted at payout. Most sellers break even around four subscribers.

One calm path below: pick what you're selling → set a monthly price → rights → publish.