First of all, I don't think "selling to minors" would stop anyone from doing it. I mean the online porn industry is everywhere, and I assume at least some of are legal otherwise they will all be banned by now. As long as you consult with a lawyer and implement a "I acknowledge I am above whatever age".
Yes selling cigars might be a better idea but this market is more saturated. Google and see how many players are there. The high income group that buys cigars may not buy them online. On the other hand, regular smokers do buy stuff online.
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