Why would they want to sell one product that shows that there other products are complete bullshit. The only way WL will ever sell LPM's is if they calibrate them to read 200-300mW over actual power.... and it is definitely not beneath them to do it either.
Self proof of anything is considered bragging. The LPM, whether sold or not will be in favor or biased towards WL.
Using an analogy, its like trying to justify yourself when you already have a terrible reputation among your colleagues, and then attempting to justify yourself in the most inappropriated manner possible.
Wicked lasers, having some degree of sense, will not sell these LPMs, as thus, if one were to test a dollar-store reddie, it would oddly read 120mW, which is either unlawfully unreasonable, or just plain propaganda for the company.