All the social media platforms that distribute a part of their revenue among users fail into the same trap.
The users will start using the platform because of the opportunity to get paid,not because they like the platform or the content.This would lead to a low level of real user engagement and this is something advertisers don't like,which makes me think that no big advertiser will gonna pay for ads.
Good luck with your project,OP.
Trying to find out on the answer of OP regarding into this insight and also that Newbie above posting up positively and talking about ICO seems really obvious.
Lots of projects tends out to try this idea but most of them do failed up.
Trying to follow up those successful ones isnt bad and giving out some payouts or free on initial set-up isnt bad but should really be temporary and as been said this would only
lead for people to get in because of such monetization or benefit not purely on engagement.