I do not think that bounty campaigns will not be needed on the near future.  Exposure is always an exposure, there are some project that lacks funding for their marketing program even though they have a very good plan.  With this projects bounty campaigns will thrive even though they decided not to choose this forum in launching their campaign programs, bounties will always be there since these people will pay for their marketing and advertisement campaign.  Besides, IEO had been around for sometime now.