In a study published in The New England Journal of Medicine, the "smoking quit rate" where free e-cigarettes were given away and where the participant could pick their flavors is 4.8%.
Where participants got the free smoking cessation products plus a cash reward for staying away from tobacco - $100 for the first month, an additional $200 at the three-month mark and $300 if they stayed smoke-free for six months - 9.5%.
The study didn't give away free e-cigarettes plus a cash reward, or at least that wasn't detailed in the article I read.
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