There are practical and legal thresholds, yeah; if X% of the company doesn't join over the next N months, you'll probably see lines in Google-related articles a

There are practical and legal thresholds, yeah; if X% of the company doesn't join over the next N months, you'll probably see lines in Google-related articles about the "failed attempt to form a union", even if it doesn't warrant headlines. I should also note that 1% is like, a starting number here. If the union is successfully formed and dues start accumulating "Let's cut the union dues to 0.5%" is going to be an extremely popular position for (prospective) union leaders to take.