I don't understand how people are going unbeaten with this tactic. I'm playing in the MLS, and I'm lucky if I win half my matches in one year. Three years in, I've made the playoffs once (lost first round). I've made some good runs, certainly, but nothing to write home about.
Everything I've seen indicates that people are playing in the Premier League and other high-end leagues, indicating to me that they have much better resources than I have available to me. So it seems to me that this tactic requires a team with decent resources, and with fair parity against opponents- in other words, not the MLS.