That quote pertains to acquiring funding exclusively for programs that will use DDT, and basically says that donors will be reluctant to fund something that involves spraying DDT. Unless the only people who bother to give any money to these programs are misinformed bleeding-heart environmentalists, I'm not sure how much of a barrier that is. Nothing is stopping say, the Cato Institute from starting a DDT spraying initiative to fight malaria.
Yes. Many nations have been told, in so many words, that if they continue spraying DDT they can go find health funding elsewhere.
http://www.nytimes.com/2004/04/11/magazine/11DDT.html?pagewa...
The above article cites Mexico, South Africa, Belize, and "[m]any African scientists and health officials" as having been pressured in this manner.