As nice as it is to have people give you money, at this point a kickstarter would pretty much be the same as a pre-purchase campaign. Relax, HoI4 is very much happening (or at the very least i have a hard time imagining anything short of armageddon stopping it), with or without extra funding.
However, if you DO want to help out, go forth and spread the word: http://www.heartsofiron4.com/
Cheers
However, if you DO want to help out, go forth and spread the word: http://www.heartsofiron4.com/
Cheers