It will be a bleak day when BC hits the skids, as inevitably happens with any such service (unless not backed by a solid non-profit).
Not necessarily. All a union is is a way of collectively negotiating. Whether those terms include stipulations about the way creators are treated is up to the union's members.
There is a private non profit entity (with a "it's complicated" relationship to the government) for consumer protection in my country to which you can go for little money and ask them to help when you suspect a company is acting illegally.
They'll advise you, help you write letter, link you up with a lawyer or sue on your behalf. Sometimes they go after companies for things like "creative" TOS or to have courts clear up grey area of the law.
Recently they became one of the few entities who can start the entities who can start the local "equivalent" of a class action suit.
As a whole it's working pretty great.
"You are required to bargain over mandatory subjects in good faith, which includes the duty to provide relevant information to the union upon request and to refrain from unilaterally changing any of those terms and conditions without first notifying the union and bargaining with the union to lawful impasse. The duty to bargain in good faith does not mean, however, that you must reach agreement with the union on any proposals; rather, it merely requires you to approach bargaining with an open mind and desire to reach agreement, and that, if you reach an agreement, to sign the resulting written document.
"You may also choose to bargain with the union about permissive subjects, which is anything that is not mandatory or unlawful."