You came up with a very interesting idea. But there is one problem. Do you think someone will do this? Because it is superfluous work. It is much easier to pay once at the end than to pay every week, because some projects run the program for several months. They need to do a lot, but here is a new point, which, if applied, cannot be carried forward. In general, I believe that no one will do it.
if that things work do you really think the campaign will open for all? Of course not ,they will only required a number of member to participate and besides counting everything is the manager jobs , so even its weekly ot monthly its still the same unless the manager is too lazy not to count all qualified participants in weekly basis.
I think best solution for bounty campaign hunter is distributed coin on time, after ICO or IEO ended is not the reason why have to delay distribution for bounty participants, its not care about how much coin price on the exchange market or coin not ready for listing.
the delay is ok if there are value we are expecting to the tokens we hold the problem if there is not , why delaying to distribute the tokens which is actually dont have value.
The problem we experience right now is the payment rate its too low for the job done.