I have overhead many people in various bounty groups talking about how bounty campaigns are gonna die should we move on from ICO to rampant IEO issuance (maybe the exchanges shall take over the advertisements or so).

Fact is that if IEOs become a thing, many projects will arise and hence the services of bounty hunters shall be required again. Every project needs advertisements to expand and that's why we are there as bounty hunters. This is the same way ICOs grew in number.

All we should hope for is a better crypto ecosystem because at the end, we shall be needed for promotion in one way or the other