It's even worse. Lambert Dolphin is the the primary funder of Barry Setterfield and his C-decay model, which is the advancement of the Montgomery & Dolphin paper. The C-decay model is a primary exhibit of what happens when people don't pay attention to significant figures in their work. Garbage in, Garbage out.
I figured. If the speed of light were discovered to be variable, I'm certain I would have come across it in a mainstreem publication. Actually, it would be headlines, worldwide. Nobel Prize stuff, not hidden away in cultish websites.