He'll correct me if I'm wrong, but I believe what Kevin is asking about isn't soliciting test-takers or any linking between WikiTree and FTDNA, but pertains specifically to the option that some FTDNA Group Projects enable which allows people to donate funds to the project. These can then be used at the project administrator's discretion for things like purchasing upgrades for strategically important kits, or helping to pay for new tests that people may have difficulty affording.
Unfortunately, I can't answer Kevin's question.
It also might be worthwhile to note--because I think it could otherwise cause some confusion among the 11,000 FTDNA Group Projects--that the effort to use Space pages for pedigrees and other information associated with FTDNA projects is a WikiTree one, that FTDNA is not promoting this as an alternative or adjunct to its GAP data structure or communicating with project admins about it.