I haven't used it, but there is a youtuber named grav3yardgirl or bunny and she did it. She got incredible feed back with it. Her main channel trailer which is what she used got over a million views. I think if your trailer is truly eye catching and good quality then you will have excellent feed back. Also if it is really good then youtube will want to use it more as an advertisement. Anyways, she used and now she has over 1.5million subscribers. I think it's worth it if you have a good quality trailer.I was just wondering what kinds of experiences you guys had with fan finder, if it was good or not, I'm still trying to create my channel trailer.
I noticed truly no benefits with it, and I don't see how they would or can promote you....so I gave up on using it...