Ask the projects teams they will give the best answer, bounty hunters are promoting projects to get money out if them but as for exposure it thus works many projects ended up on binance exchange and they introduced bounty campaign months back, sometimes the project team also get greedy too
The teams will give a divided answer, while some teams tend to give bounty participants a credit to the marketing of the project others will disagree. Again the fact that the former group may have been more successful to deliver the project is also worth nothing while the later may have just been a failure from the start. Hence it is difficult to judge how much impact a bounty project might have on the investors but the bounty hunters are defenitely a soft target for the blame game.
Exchange listing is never a factor of determining the success of a project. It may just get delisted in a year - but nobody would care for it then. The important part is whether the MVP is being developed and at least a version of the prototype should be working.
For some reason there are project fails its because first they don't have clear proper outlook towards their project. Second there team member is unknown or not transparent to show their identity and last they rely to much on the campaigns here and didn't do any follow another marketing to increase the hype of their project that's why they end up failing and blame it to the campaign and its participants.
Also for thinking about listing well I can say they are success to that since meaning they are getting sales on their ICO,IDO,IPO or any words what they to conduct token sales. And those exchange listing is the prize for their investor and bounty hunters since they will get their compensations for participating their project.
Everything should really be in proper place so that investors or people around would able to know on what the project is all about and the roadmap does it have so that anyone would tend to check out will definitely have the idea on what or on where the project would really be goin.