They previously stated that they will donate £50 for every 180 scored during the tournament; also if the players match or exceed the total set last year of 501, the aforementioned £10,000 will also be donated.
This means before the final tonight, the current total is at £25,050; with it likely increasing in the tie between Rob Cross and Michael Smith.
Smith hit the maximum needed for it to be 301 180's so far, watch the video below:
https://twitter.com/OfficialPDC/status/1155212712084791296