Among the three, I am interested with all of them, since if you take a look at it, its all free money, for referrals, you didn't do anything,, someone just got a link of the companu from you link, which in a way, will also give them links, for bounties, it is great since you can njoy browsing the web for ideas and sharing them to one another and all you did is to help promote the ICO, for givaways I think tjis is the airdop, you just need a legit ICO that will do the airdrip and you can cash out anytime,, if Iam going to rank them according to my liking, bountry first, then giveaways, than referrals is the last, since it is more likely to ba a scam nowadaya.