Your argument about corporate secrets is sufficient to change my mind on activist patent trolling being a productive strategy against AI X-risk.
The part about funding would need to be solved with philanthropy. I don’t believe that org exists, but I don’t see why it couldn’t.
I’m still curious whether there are other cases in which activist patent trolling can be a good option, such as animal welfare, chemistry, public health, or geoengineering (ie fracking).
I’m pretty sure there’s no such use it or lose it law for patents, since patent trolls already exist.