Yours is a unique case indeed - considering all three batches of Primo 200mg were made with the same equipment, recipe etc. with the same batch of raws, carrier & BA, with the only difference being the colour of the BB between the latter two batches, I'm unsure what that 'something' might be - if you've any reasonable theory, please post it and I'll see that it's tested for.
It's impossible to give exact numbers, but I would roughly guess that the ~350 vials sold between the three batches so far have been purchased by ~110 unique customers, and there have been about 5 reports of really serious PIP/symptoms of illness so far, which I still believe are inherent to the high concentration of Primo, as you can find exactly the same reports of customers from other labs product at the same/higher concentration.
It's certainly frustrating that some products well tolerated by the majority of people are a nightmare for others, but other than spreading awareness about this potential issue, I'm not sure how to tackle it.