eHarmony Free Weekend Drives Spike in Traffic

Every time eHarmony has a free event, I post about it on my site. I'm normally on the first page of Google for the event (as long as I can submit it early enough). This time for many of the searches I'm in the top 5 for many of the search terms and this is driving about double the traffic I would normally see. I think it's great but I do wish this was from a more permanent source - my traffic for this search will likely start to drop today and will be all but gone by this Sunday when the event is over.