That’s a culture-thing. I’m a member of two forums that are still pretty active. One views dead thread revivals as amusing, the other almost literally has a celebration in-thread when it happens as all the members with older posts in it come piling in. Heck, the second forum has a thread so active that people literally ask for, and get, recaps for the last X amount of time for it.
Nah, alcohol shares the same boat. There are lots of examples if you really dig into the effects of various things. Alcohol and tobacco just kill you so slowly that it doesn’t drop profits.