Received knowledge is they fund by law suits when their free speech rights are denied by a municipality.
Could use some more digging, methinks.
These asshats are major league travelers.
And they always seem to bring quite a crew...
If I were Phelps, I'd keep my books as clean as a preacher's sheets, but Phelps is as crazy as an outhouse rat, so there might be something there to latch on to.
Where's the IRS when you actually need them?