Home / Why one piece in every Monopoly promotion set is rare
Why one piece in every Monopoly promotion set is rare
How scarcity works in collect-to-win promotions, why the common pieces pile up, and how to avoid piece-trading scams.
Play KirayaThe rare piece is the prize odds
In a collect-to-win promotion, every prize is gated by whichever piece in its set was printed in the smallest quantity. The other pieces in that set can be printed in the millions because they cost the promoter nothing: without the scarce one they claim nothing. This is why a large collection converges on the same shape for everybody, complete except for one square per group, and the more expensive the prize the scarcer its gating piece.
The published odds are the real answer
Promotions of this kind normally publish the number of each piece produced, or the odds of finding one, in their official rules. Those documents are the only trustworthy source. Lists circulating on social media of which pieces are rare in a given year are frequently wrong, sometimes deliberately, and they have no way of being authoritative before the rules are published.
Where this turns into a scam
Because one piece is worth a prize and the rest are worth nothing, listings offering to sell or trade the rare piece are common whenever a promotion is running, and most are fraudulent: a photograph is not a piece, and a piece in the post is not a claim. Official rules for these promotions also usually prohibit transferring or selling pieces outright, which can void a claim made with one. If a stranger is offering you the one piece that stands between you and a large prize, that is the least likely part of the transaction to be real.
A note on this page
Kiraya is an independent browser board game and is not connected to any promotion. We deliberately do not publish which pieces are rare in a current campaign, because we have no way to know it and a confident wrong answer would cost someone money.