bounties exclude those who are getting started
tenure is bad if it holds between projects (look at roasbeef's horrid record on btcd and lnd)
devs need to have a stack as soon as they can put one together
bounties are generally bad because of vagueness...
if you want to offer a bounty for some task, sit down with an architect and break that bounty down into milestones
if you want to pay to get stuff built, you should spend some effort first in making the task crystal clear