I agree, they are not very useful either… 
By the way, the topic of importing for personal use has been discussed here many times, 300 ml is valid, for example, I also wrote a post pasting the text of the regulation
I guess this is why (also) you were able to bring PallMall back, although I don’t know what the limit or the wording of the regulation was then.
And what @Gambler wrote about the NAV phone information regarding disposable devices is very strange (since they are forbidden to be sold even in black market shops and are persecuted with fire and iron) but it is indeed in there (point k) 
j) 300 milliliters for e-liquid, and
k) * 800 pieces for single-use products of the new tobacco categories, 300 milliliters for their liquid,
l) * 500 grams for smokeless tobacco products,
m) * 500 grams for nicotine-containing products for smoking replacement,
n) * 800 pieces for heated products.
Source: Jöt. (új) - 2016. évi LXVIII. törvény a jövedéki adóról - Hatályos Jogszabályok Gyűjteménye - Wolters Kluwer - All rights reserved!