I think suppliers are either unaware or can charge higher prices because it has the 100mg/ml label we are all familiar with. However, it is 100mg/ml nicotine 'salts'.
I get that. Also, in your absence, I tried to do some research on my own, but there's very little reliable information out there about the nicotine content equivalency between freebase and salts. But I found this:
https://www.quora.com/How-are-nicotine-salts-different-than-freebase-nicotine
"Nicotine salts are produced in an acid/base reaction. For many commercial products the acid used is benzoic acid, which yields benzoic nicotine salts. Because it’s a salt compound, the effective ingredient (nicotine) is less weight-for-weight. 50mg/ml of benzoic nicotine salts is about the equivalent of 27mg/ml of freebase nicotine. It’s important to know what salt you are dealing with and the equivalent nicotine dose so that you can get the concentration right - it’s based on molecular weight."
So I get that, chemically speaking. What I still can't understand is why all manufacturers, including juul, insist on listing nicotine content in mg/ml, by weight, and not nicotine salts.
Even juul follow the chemistry (scroll down)
JUULpods and E-Liquid FAQs - JUUL Support
From your link:
How much nicotine is in a JUULpod?
Each 5% JUULpod is designed to contain approximately 0.7mL with 5% nicotine by weight (approx. 40 mg per pod based upon 59 mg/mL) at time of manufacture. Each 3% JUULpod is designed to contain approximately 0.7mL with 3% nicotine by weight (approx. 23 mg per pod based upon 35 mg/mL) at time of manufacture. Nicotine content may decrease over an extended period of time.

