The blue tick your referring too is a "verified account" tick If I'm not mistaken. This is used to let people know that the account is that user/personalities actual account, and not a fake one.
While I will agree with you that the "verified" symbol likely does pique some users' interest, I do not agree that it will pull in that many new viewers.
I hold fast by the belief that community is the answer to pulling in new viewers. If people find that your interest align with some of their own, then there's a high chance that they will flock to your content. If those people that initially flocked to your content have a reason to get exicted for the things that you produce / do for the community, then there's a high chance that they will sing your praises all over.
Real life example: I have a viewer that found out about me through my interactions in a community forum. Soon they found out that I take request from the community, and they decided to submit a few of their own. Satisfied with the content that was produced featuring them, they told their friends to check it out. Fast forward to today, I'm in a situation where one of their friends like the content I produced, and decided to submit one of their own to me.
Because of my interaction with the community, not only was 1 excited subscriber created, but 2 were created essentially based on word of mouth. As an added bonus, I also had an easy time producing that content because the viewers essentially gave me the material to work with :3
