Among the popular IEO, Harmony is one. They have been running a bounty program even before the binance partnership and with it getting the lauchpad of binance, the attraction towards it's bounty has highly increased. Though I believe token bounties are a better earning, I prefer quick cash for my work.
If I know earlier that they will be included in Binance launchpad, I would have joined in this campaign.
But yeah, it's a good campaign, anything that's in Binance for IEO has a good chance for giving the bounty hunters a better reward.
I hope the trend will continue and more projects in IEO will offer bounty.