Yes they may have there own tools but the coding is the same as what Gateway would use to dump roms. As far as I know these company's for example one being GW that develop there cards, software etc.. they normally get in touch with the main scene ripper groups through there emails that they put up when they release a scene rip then they give them a copy of the card and firmware for example way before its released to prepare for the product when it is released! So there is something to use when it comes along. They don't use a special tool that know one knows about and then dump a rom and hope that someday it will work on a method, they will have an idea that there dump will work one day because they have been given the rite tools to be able to dump the actual game. Its been the same method for years, this info I have been told by an actual ripper.
Correct me if I'm wrong, but how can we know who BBB or Contrast or Absktrat are? They don't even have public emails. So that theory of Gateway contacting them isn't plausible.