The original signers reads like a who's who of alternative cosmologists [MOND, CREIL, Plasma, Arp et. al]. They certainly have a vested interest in saying there should be more funding to explore non-standard ideas about cosmology.
Today's Cosmology may be like Ptolemy's epicycles in some ways. We make observations and have to tweak the theories. At some point in the next decade or two we will know much more than we do now about dark matter etc. through lensing, accelerator experiments, supercold condensates, and other tests.
The theories these guys support are worse, as far as assumptions needed to match observations.
Forming opinions as we speak