It's not rap, it's hip hop. Completely different. To quote from their website it's "The Biggest Hip Hop Festival in Asia"
I'm sure that the under 50's crowd of foreigners are interested in hip hop.
Living in Pattaya, hip hop is played everywhere. You walk past a beer bar, it's played. You go into a nightclub, it's played. You go into an Agogo, it's played. You walk past one of those cocktail cars, it's played. If someone doesn't want to hear hip hop, they shouldn't be living in Pattaya.