Yes it looks like it will be like itunes and spotify the different is the users have a chance to show on how much they love and can support the singer by giving them a token as a rewards/tips.
That's cool, this will really help encourage singers and fund those with raw talent with limited reach to funds, nice project rooting for you guys.
Not sure if it will be like iTunes. But do we know approx how many users are using iTunes. Just want to know how many people actually paying for songs
Can't put a number on that, only Apple has that data, I'm pretty sure the number of people are quite much given the subscription fee isn't much, less than $5 monthly i think.