A method in a server computer connected over a network to a group of participants, where each participant operates a client computer. The method receives a payment for each participant in the group, associates the payments received for the group with a time period, calculates a designated portion of each payment, and creates a fund for the time period by combining the designated portions of the payments. The method receives a notification for each participant in a subgroup of the group of participants, where the notification indicates that during the time period an event occurred. The method calculates a portion of the fund to disburse to each participant in the subgroup, and disburses the fund to the participants in the subgroup, where the portion of the fund to disburse to each participant in the subgroup is a share of the fund.