Bumping somebody else's request commits you to donate a reward of at least the minimum amount - 10 WRZ$.
Your request will be deleted if there has not been a reply within 14 days of the last post.
Keeping the requests forum neat and organized is one of the reasons why we limit the number of bumps per user (two) and the total number of bumps overall, (six to eight) if we didn't, a request could potentially stay in the system for months without it's being fulfilled, and make a real mess out of the forum.
Once the reward has been paid, the requester should post a reply saying they did so; the fulfiller should post a reply saying they received the donation.
Having read all that, I wonder if an outsider bumps a request more than once, if he/she should also pay per bump to conform to this statement "Your request will be deleted if there has not been a reply within 14 days of the last post." Otherwise, requesters will just make multiple accounts, each account able to bump as much as they can within the "six to eight" bump limit to prolong the shelf life of said request.
Or, only their first bump should be counted and their subsequent bumps won't affect the countdown/timer.
Also, why are moderators closing threads without the "fulfiller posting a reply saying they received the donation".
If moderators have means to confirm said transactions aside from that of the requester and/or bumpee(s) statement, then it's alright. The less hassle for us, the better.