I think the time has come to give up on the tag challenge efforts. The last two challenges (June 10-23 and June 24-July 7) have collectively garnered only two entries and very little tagging effort.
Unless someone has a brilliant idea to save it I think we should give it a break for a while. Perhaps after some rest (a few months or a year) we could have anything contest to push us over the line to the generalist badge which we are now much closer to.