@Pluthero FOS often refuses to arbitrate on points of law, but looks at what they consider to be fair instead.
I hope they see the right side of it all the same. Certainly worth going to them as I've suggested before as a decision by them accepted by you is legally binding on a company, but not the other way around, meaning it's always worth a shot at pushing forward.
In the end though unless Erudio, BIS etc all do a U-turn under concerted pressure, then only way to settle it for all of us would be in court challenge. That is difficult, and I suspect they know that full well, and are depending on no-one having the guts or resources.