Posting anon. My startup failed when my backstabbing co-founder struck a side-deal with our biggest customer to essentially "sell" our IP via consulting directly to them. We were easily acquihire material which would have possibly netted us single-digit millions, but instead my co-founder took the bird in hand and "cashed out" all our internal secrets.

As I learned, lawsuits are expensive and you have to prove things that you may not be able to "prove."