Why does a Rajnikanth’s Movie (Kaala) Need Ads?

I don’t understand why a Rajnikanth movie – Kaala or anything else for that matter, need any marketing/ads?

Doesn’t everyone in Tamil Nadu or every Tamil-speaking person in the world know about the movie release already?

Creative marketing efforts like Twitter launching an emoji that appears when you type #Kaala are interesting.

But I wonder why this movie needs ads on TV/Net?

Maybe the creators could have done something about the actual issue: Improving the availability of tickets during the first few days of the movie release. Rajni may have tried, but his efforts don’t seem to be sufficient