Although the holes should in theory lessen the amount of damaging chemicals a smoker inhales, they actually compensate for the lack of nicotine by sucking harder on their cigarettes or smoking more, the RIVM says
In case the device has a coil without a wick inserted into it and completely free from e-liquid, then it would literally start glowing as a result of the heat that is being received from the battery
To give you an idea of just how big this industry is, studies show that the US e-cigarette market is expected to hit $9.4 billion in 2025
doi:10.1097/EE9.0000000000000046 PMID:31342006 PMCID:PMC6571181 14 Benka-Coker W, Loftus C, Magzamen S, Karr CJ
Nationally, the rate was 6.0%.2 Other tobacco product use: Ohio Vaping rates in Ohio In 2018, 5.4% of adults in Ohio used e-cigarettes and 4.3% used smokeless tobacco.3 In 2019, 29.8% of high school students in Ohio used electronic vapor products on at least one day in the past 30 days