Same underlying mechanic as the raffle demo, applied to a different real-world problem: picking which items get a closer look, without any single person being able to steer the selection. Fits things like AML/compliance spot-checks, customs or shipping-container inspection selection, or any "which of these gets audited" decision where the selector shouldn't be trustable on their own word.
Locks in the current block height the moment you submit, then waits a couple of
blocks so the eventual result isn't knowable in advance by anyone, including this server. The
selection is derived from those future blocks' mix_hash values, not a server-side
random number, so it can be recomputed and checked by anyone who has the candidate list and the
beacon value.