Santorum hasnt relied on big money donors. Neither has Paul. I see no reason why they wouldnt continue with their current strategies. Newt on the other hand is screwed IMHO. He's in for sheer ego, and that's fine by me.
I dont expect Santorum to pull out and support Romney if he doesnt think that's what's best for the country.
The only real strategy here is to push for a brokered convention. Again i dont have a problem with that. Some of our best candidates came out of brokered conventions. It will give tons of media attention on the Republican side and completely blanket out Obama.
Santorum has some big money donors, don't kid yourself, he had the millionaire who said women used to hold aspirin between their knees for birth control. But big money or little money no one wants to bet on the horse who has no chance of winning the race and the numbers are showing that.