I haven't seen big IEO projects on binance that has bounties ,the IEO projects with bounties are those available on small exchanges like bitforex ,idax ,latoken but the best IEO project with bounty so far is Harmony
Binance's Harmony IEO had a bounty campaign and Harmony hunters will get very good rewards from there!
Bounty on project Elrond, not even the bounty, community program - as they call it, but now i checked, the website says is temporary disabled, someone heard what happens next ?
Most of the Binance IEO had not a bounty, because they don't need promotion actually! Binance I enough to make a good hype. Only Harmony IEO had a bounty, but when they accepted in Binance IEO launchpad, Binance asked Harmony to stop the bounty! So, It means Binance doesn't like the bounties for their IEO projects!