The vast majority of those "PhDs" that tout snake handling, fasting for fun and profit, magical pancake for Jesus and longevity, etc. are either out of diploma mills or they are "honorary" ones bestowed upon them by the guys they had just made fellow "doctors." Rexella got doctored recently from a distance course run by a dude who keeps on having to change states where it is registered, and has been on the van Impe's show many times. I think Jack's is from Oral Roberts, so that doesn't count for a hill of beans, as it is a D.D. which is worthless and not a PhD at all or an STD, which is the theology equivalent of a PhD issued by a seminary and not a general university.
You do know, for all those who have Drs. in the pulpit and on the TV that "real" doctors, regardless of discipline devote years of study to many subjects and then spend a couple of more researching an original contribution to scholarship and prepare a book called a dissertation before they even have grueling public multi-hour defenses, right? And that is after they have had a multi-day written exam over at least three if not four areas of study? And they have to read at least three modern research languages as a rule, plus any additional ones reuqired by the committee?