I'm using the cycler here (you do need to have Virtual Router installed first though):
http://gbatemp.net/threads/macycle-the-improved-mac-changer-for-homepass.353328/
Set it to Random, and gave it an interval of 177 seconds (with 3 second cooldown for the card reset) , since that works out as 8 hours to cycle through all 160 MACs.
I didn't get any hits either for the first 10 I did, then I got a bunch of hits (but it's pretty obvious that there's not a lot of players doing this, I only got 3 unique people in 10 hits when I harvested them but that doesn't matter for villagers).