Methinks it has something to do with the fact that

1. Haiti is overwhelmingly Catholic and some Evangelical groups still consider Catholics to be 'devil-worshippers'.

2. There is a whole lotta Voodoo going on down there and people wrongly associate it with Satanic rites.

'Pact with the Devil' conveniently brings both up.

In terms of drumming up money from like-minded Christians, it didn't ring that way to my ears. It could be interpreted as a veiled threat. Why would a devout Christian send money to people who work for the Devil- disaster or otherwise? Pray for their souls- yep. Money and goods? I'll have to do some digging.