If Vaiko continued in DMK he could not get this much popularity and whatever his ability, he could not show it. All of his tallent covered by the charishma created for the sons of Karunanidhi.
What popularity now Vaiko enjoying is only due to his quit from DMK. Which give him a good identity. In politics there is no idiology at all. All if them are behind power and to earn money by power. That is why Vaiko jumbp from one place to other.