One million pixels at ten cents, in ten price waves. Same idea as 1milllionpixels, same week, $111.

Why it works: The cleanest A/B test in the list: same product as 1milllionpixels, same week, a factor of 275 in revenue. The difference is distribution.

A Monopoly-style board where every square costs one dollar more than the last owner paid.

Why it works: Clicks as rent is a real idea; the board had five paying squares after four days.

Ranks expire after 24 hours unless you pay another dollar. Renamed after eight days.

Why it works: Expiry was meant to force repeat payments. It produced $109.

Launched one day after Brand My Mac. One of ten spots taken, $49 of $2,299.

Why it works: Copied the format within a day, without the press and without the refund rule.

Ad spots in a grid. When the grid is full it doubles, and so does the starting price.

Why it works: Supply doubles with demand, and price doubles with supply.

Last vote owns the homepage. One dollar a vote, a different game every evening.

Why it works: Timing instead of amount: the last dollar wins, not the biggest.

One $500 spot on the flap, everyone else shares a QR code ranked by what they paid. $34.

Why it works: The fixed $500 flap spot stayed empty; the $1 QR ranking made $34.

Buy a key on the internet’s keyboard. The first key is free, the rest start at $1.

Why it works: A fixed, familiar grid (a keyboard) as the inventory.

One company owns the whole page until someone pays $3 more. Visitors bet on how long the reign lasts.

Why it works: Inventory of exactly one, a fixed $3 step, and a public reign clock. Four takeovers in five days.

A shared wall of posters. Paste over anyone’s poster for 1.5 times its price.

Why it works: Displacement in space instead of a rank in a list. Tiny, but the pasting-over is named and timed.

Digital magnets on a shared fridge door, $1 to $999. What you pay decides where you stick.

Why it works: A fridge door as the board. $7.

One dollar is one centimetre, and it goes soft by one centimetre an hour unless you pay again.

Why it works: Decay as the mechanic: the rank rots unless you keep paying. The joke is the whole product.

The iPhone home screen anyone can buy. Dock spots by auction, from $1.

Why it works: A home screen as the grid; the dock is the scarce row.

A pay-to-rank board whose listings are other pay-to-rank boards.

Why it works: It sells the wave to itself: the buyers are the same people who built the boards, and being on it is a joke worth ten dollars.

Bid for ad space on a real T-shirt. $9 so far.

Why it works: The wedding suit idea without the wedding or the audience.

The same rank mechanic, with the money going to charity. One purchase in a week.

Why it works: The same mechanic that made five figures elsewhere that week made $4.30 when the money went to charity. Pure status sells; charitable status does not.

Ten laptop spots plus eight backpack patches rented by the month. $0 so far.

Why it works: Added a recurring product (backpack patches) to the one-off format. Nothing sold yet.