NEW YORK (AP) — GoFundMe CEO Tim Cadogan had some complications while fundraising on his own website last fall. Several friends wanted to help Cadogan reach his $28,000 goal as he crowdfunded for a Los Angeles area wilderness rescue team. However, they tried to donate through a lesser-known but growing wealth management tool called a donor-advised fund, or a DAF, a no-frills investing vehicle for money earmarked as eventual charitable gifts.