Every world on the rack got a fresh account and at least four weeks of visits, in Chrome and Firefox on an ordinary laptop, without spending a penny. The note on the back of the card is written in week one. The longer letter is written when we leave. The stamp is decided last.
Depth. Are the decisions still interesting after a month, or has the world turned into collecting timers?
How the world treats a visitor who never pays, and how loudly the shop asks. A high mark means you can ignore it.
How soon a new arrival gets to the first real decision, and whether the middle of the game keeps moving.
How well the place is kept: interface, stability and load times over long sessions in a tab.
The stamp
The stamp is the weighted total out of ten. Nothing under 7.0 is posted; a world that scores lower gets no card rather than a bad one, because a rack of things we don't recommend isn't useful to anyone.
Who pays for the postage
Affiliate commissions. The "Set off" buttons lead to each publisher's official site through a tracking link, and if you create an account afterwards the publisher may pay us. That doesn't change the price you pay, and it has never changed a stamp. Publishers don't see cards before they're posted and can't buy a place on the rack.
When cards change
We revisit every world each season. If a mark moves, the letter says so and the date on the card is updated.