Because 20 cigarettes worth of nicotine is found in a small amount of ejuice. What they are neglecting to share with you is that the absorption rate of ejuice versus actual smoking is far less. Some estimate it to be 10-40%. In conclusion, they are either ignorant or they want your money, moreover it's probably both. Oh the almighty dollar....
The Vaper's Handbook:http://www.vapershandbook.webs.com
Musician, coder, former smoker (hopefully for good this time).