The ones I know of made a living by selling books about it. (McDowell for instance.) That isn't really the issue though.
I encourage all Christians to stop treating the canon like it must be waxed like a car. Put McDowell in the attic where he belongs next to Nostradamus. Let science do its thing, and let God do his: assuming God can do things and assuming scripture actually has power. That is kind of the point isn't it that God can do things and that scripture has power in it.
I think Christians should: 1. let God defend God. 2. Not treat scripture like it has to be protected from scratches 3. Not look for signs and proofs in it or for it or about it.
[Jdg 6:31 NIV] 31 "...If Baal really is a god, he can defend himself when someone breaks down his altar."
[Isa 48:11 NIV] 11 For my own sake, for my own sake, I do this. How can I let myself be defamed? I will not yield my glory to another.
[Mat 12:39 NIV] 39 He answered, "A wicked and adulterous generation asks for a sign! But none will be given it except the sign of the prophet Jonah.