Sad part of this bounty activities you work for the team and wait till they give your rewards but then after the value isn't worth for the time that you work, and some of them ending up to be nothing or just a scamming project that resulted to nothing at all.
At present we cannot expect too much from the bounty that are running, because many bounty have been completed but not paying participants at all, and of course this is very detrimental to the bounty participants
only ico are more risky because usually the coins are not yet listed to an online exchange but not ieo because the ieo's have already listed thier coins on an exchange that do ieo however you should choose a good looking exchange when choosing an ieo , much better if you can go for the older ones because they already have a reputation and they will doubt to risk it if ever they attempt or decide to scam thier costumers .