The idea is interesting. This would encourage people to write quality posts and possibly further reduce the amount of spam in this forum. But on the other hand, capitalize merit quite difficultly and it can result in a new wave of sales merit and will give the opportunity to influential accounts to capitalize on this. Merit as gratitude for useful information will almost never be applied.
To partly avoid the situation bounty reward could be paid not for the count of merit points but for how many
different users merited the message.
For example
1 user merited the message - 1 stake
2 users merited the message - 3 stakes
3 users merited the message - 8 stakes
5 users merited the message - 25 stakes
So it's not matter how many merit points you get from a single users
So, what do you mean is add some additional stakes to post/message which has been getting merit from others?
I think almost of bounty manager/community won't do that (manual check).
As far from I know, bounty manager will add some bonus stake to participants who have been getting some merit points. They do not add additional stake by merited post/message