Silent Donor is flourishing just as the privacy debate for contributors heats up, especially for those using donor-advised funds to anonymously give to their favorite, and sometimes controversial, causes while also getting a tax break. In November, the IRS proposed new regulations to govern donor-advised funds, including changing what services can be considered tax-exempt and imposing a 20% excise tax on donations that provide a significant to the donor. Public comment on the new regulations will end on Feb. 15.