i didn't knew/remember about that system, i thought u won nothing from editing posts but i thought about this idea:
Member A edit the post of Member B and Member B choose if that edit was helpful and if is, reward it with 1 extra point limited to 1 point per thread to each different Member no matter how many ppl edited it nor how many times if the OP found worth the edition of Member A that person will receive 1 point, 5 if were a huge improvement and the OP were willing to lose points for it, in the other hand, if the OP doesn't want it could simply choose to don't give a point, if Member C also edits the post and improve it even more, Member B could provide even another point to Member C.
the reason is simple specially in my post i often to do walls of text that i know could get a lot of improvements but i don't have the skills/will/time to do them so i really enjoy when someone edit and really improve my posts, and i were willing to give some of my points as gratitude for that person being active part of the development of a great answer.
I know that u require a high ammount of points to edit, but still were good that ppl were more involved into helping and improving the actual knowledge rather than having to create a new answer to add-up all the information missing to the existing one.