What's to investigate? ~ it's a fizzy drink, full of sugar and caffeine. Alternatives made by Coca Cola without the "nasty" ingredients do not taste the same as the original and are not as popular, probably for that reason.
The manufacturers sell their products aggressively anywhere and everywhere.
I find it refreshingly pleasant even if, as a diabetic, I am advised not to drink it ~ I know people who like it and people who do not ~ hardly world shattering TV though.
BTW ~ Who is Mark Thomas?