There's absolutely no need for this product. Normal vape is like $20
A single use disposable is like $4 - $10, depending on how many puffs, and some people just want something they can puff on for the weekend and then quit, not something they can use/reuse long term.
Sure it's not healthy, and it's environmentally irresponsible with current single use disposables, but there's definitely a market of "casual smokers" that don't want to commit to a non-disposable vape.