For the sake of argument -
Perfect example. CE2 cartos crack, break, sometimes need mods to work right. Everyone who has been on this forum for any amount of time KNOWS that. Gotvapes likes to make things look like they invented them - but they didn't invent CE2 and it's not their fault CE2 cartos need skill to use. Things like CE2 attract newbs - but are not for beginners - they are for people who are tinkerers and are willing to screw with them, mod them for better flow, replace the tube if it cracks. Many people who KNOW how to use CE2's love them. Many people who use CE2 tank mods depend on them. Gotvape carries some leading edge stuff and experienced vapers appreciate that but IMO maybe some of that stuff should be stamped NOT FOR NEWBS or EXPERIMENTAL because newbs don't understand that not everything in ecigs works by itself.
There are also many things new vapers do wrong - using the wrong thickness of juice in things, buying auto batteries and killing them with juice leaks, sticking very low ohm attachments on batteries they don't belong on. I truly cannot imagine what a vendor has to deal with.
I'm into this late but your correct, a CE2 version 4 or under needs a tank mod. Wouldn't even think of it without one