You can read the reply for yourself:
Thank you for contacting Christian Children's Fund through our website.
Christian Children’s Fund made the decision to decline the gift from Gen Con, LLC after the review of numerous factors that in combination precluded our acceptance of the gift. These reasons include the possible misinterpretation of CCF’s role in regard to the event. CCF is selective in its endorsements or support because it must maintain the highest degree of integrity with respect to the use of its name and logo. The information presented to us gave the appearance that CCF (the organization) was an endorser or supporter of the event instead of a beneficiary.
Thank you for your interest in CCF. Please contact us if we can be of further assistance.