Coins die here every hour and nobody buries them.
Reading the ground…
A grave opens on the target the ground works out: enough to put the curve back on 0.05 ETH. Everyone who puts ETH in buys at the price the coin died at; when the target is reached the whole pot goes through the curve in one transaction and the coin trades again. Afterwards each digger claims their share of what the pot bought.
If the target is not reached in seven days every contribution comes back. Nothing is held, nothing is locked, and a failed dig pays nobody a fee.