In view of some questions, here are some details about the fundraising via Kisskissbankbank.
Any money paid gives rise to a counterpart.
During the fundraising operation, the sums paid are frozen.
If the €2,500 target is not met, the amounts already collected are immediately refunded to donors.
If the target is met or exceeded, counterparts are sent before October 19, and donors—at least French—can deduct 60% of the amount from their taxes.