I think Southwest is moving to a hub and spoke model, but historically they haven’t used it. Skip lagging seems to mostly rely on a “I want to travel to the hub, so buy a cheaper ticket to a different spoke and jump off at hub” methodology.
Which is to say, Southwest may just not be “vulnerable” to this atm.
Ive heard of people making this happen, but I literally don’t know how y’all achieve more than like a single flight or hotel stay per year without already having 200k+ income (i.e. could pay for the trip on your own, just don’t want to pay for it).