Everyone knew the rules going into this. It appears to me that the vast majority of the people commenting here got themselves up to 20 kills, and then quit. They are now complaining about everyone else not covering their portion of the kills for them.
The designers have stated that they enjoy making spreadsheets. They can see how many people earned less than 30 kills during the event. If the community gets itself to 88% when the event ends, and DE sees that 95% of the community stopped after fewer than 30 kills, I think they would be fully justified in saying "look, instead of getting a few more kills you guys were wasting your time complaining on the forums. . . We're sorry, but the COMMUNITY did not meet the objective."
Then maybe give everyone a Skana BP as a consolation prize/gag gift.
I say, get cracking, team. We have 43% left to go. See you in Titania.