Earlier quoted context omitted.
What are the chances of three people trying to unionize in a company being fired in a very short span of time for 'performance' reasons? Are you holding out until the company says 'Ok, caught, yes, we did fire them for trying to unionize'?
I could definitely a envision a theoretical situation where three poorly performing employees decide to unionize to protect themselves, then eventually get fired for poor performance. Is that what happened? I don't know, but I'm not going to trust two tweets from two parties whose interests are against one another.
In this case, the employees coming out with this knowledge have everything to lose because they could easily be blacklisted from further jobs. Kickstarter has no reason to not deny their accusations and has everything to gain from it.
If someone is risking a their livelihood to say something like that, then perhaps we should take what they're saying with a larger grain of truth. Otherwise we'd be saying that whistleblowers and the PR arm of a company have exactly the same weight.